20047389040 has 80 divisors (see below), whose sum is σ = 53286589440. Its totient is φ = 6871092480.

The previous prime is 20047389031. The next prime is 20047389049. The reversal of 20047389040 is 4098374002.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20047389031) and next prime (20047389049).

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×20047389040² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20047389049) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 3266775 + ... + 3272905.

It is an arithmetic number, because the mean of its divisors is an integer number (666082368).

Almost surely, 2^20047389040 is an apocalyptic number.

20047389040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20047389040 is an abundant number, since it is smaller than the sum of its proper divisors (33239200400).

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

20047389040 is a wasteful number, since it uses less digits than its factorization.

20047389040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11990 (or 11984 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The spelling of 20047389040 in words is "twenty billion, forty-seven million, three hundred eighty-nine thousand, forty".