20994284160 has 128 divisors (see below), whose sum is σ = 74354817600. Its totient is φ = 5598471168.

The previous prime is 20994284119. The next prime is 20994284167. The reversal of 20994284160 is 6148249902.

20994284160 is a `hidden beast` number, since 209 + 9 + 4 + 28 + 416 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

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

It is not an unprimeable number, because it can be changed into a prime (20994284167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 590194 + ... + 624753.

Almost surely, 2^20994284160 is an apocalyptic number.

20994284160 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20994284160 is an abundant number, since it is smaller than the sum of its proper divisors (53360533440).

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

20994284160 is a wasteful number, since it uses less digits than its factorization.

20994284160 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1214975 (or 1214957 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The spelling of 20994284160 in words is "twenty billion, nine hundred ninety-four million, two hundred eighty-four thousand, one hundred sixty".