20994059520 has 360 divisors, whose sum is σ = 85855064064. Its totient is φ = 4798476288.

The previous prime is 20994059507. The next prime is 20994059533. The reversal of 20994059520 is 2595049902.

It is an interprime number because it is at equal distance from previous prime (20994059507) and next prime (20994059533).

It is a tau number, because it is divible by the number of its divisors (360).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 711297 + ... + 740223.

Almost surely, 2^20994059520 is an apocalyptic number.

20994059520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20994059520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42927532032).

20994059520 is an abundant number, since it is smaller than the sum of its proper divisors (64861004544).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20994059520 is an equidigital number, since it uses as much as digits as its factorization.

20994059520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28967 (or 28944 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 45.

The spelling of 20994059520 in words is "twenty billion, nine hundred ninety-four million, fifty-nine thousand, five hundred twenty".