20257057212 has 24 divisors (see below), whose sum is σ = 54018819456. Its totient is φ = 5787730608.

The previous prime is 20257057189. The next prime is 20257057241. The reversal of 20257057212 is 21275075202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 120577638 + ... + 120577805.

It is an arithmetic number, because the mean of its divisors is an integer number (2250784144).

Almost surely, 2^20257057212 is an apocalyptic number.

It is an amenable number.

20257057212 is an abundant number, since it is smaller than the sum of its proper divisors (33761762244).

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

20257057212 is a wasteful number, since it uses less digits than its factorization.

20257057212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 241155457 (or 241155455 counting only the distinct ones).

The product of its (nonzero) digits is 19600, while the sum is 33.

The spelling of 20257057212 in words is "twenty billion, two hundred fifty-seven million, fifty-seven thousand, two hundred twelve".