20057291520 has 864 divisors, whose sum is σ = 79478961408. Its totient is φ = 4291854336.

The previous prime is 20057291503. The next prime is 20057291531. The reversal of 20057291520 is 2519275002.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 299362527 + ... + 299362593.

Almost surely, 2^20057291520 is an apocalyptic number.

20057291520 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 20057291520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39739480704).

20057291520 is an abundant number, since it is smaller than the sum of its proper divisors (59421669888).

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

20057291520 is a wasteful number, since it uses less digits than its factorization.

20057291520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 12600, while the sum is 33.

The spelling of 20057291520 in words is "twenty billion, fifty-seven million, two hundred ninety-one thousand, five hundred twenty".