20258446057 has 4 divisors (see below), whose sum is σ = 21324680080. Its totient is φ = 19192212036.

The previous prime is 20258445953. The next prime is 20258446067. The reversal of 20258446057 is 75064485202.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-20258446057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20258446067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 533116983 + ... + 533117020.

It is an arithmetic number, because the mean of its divisors is an integer number (5331170020).

Almost surely, 2^20258446057 is an apocalyptic number.

It is an amenable number.

20258446057 is a deficient number, since it is larger than the sum of its proper divisors (1066234023).

20258446057 is a wasteful number, since it uses less digits than its factorization.

20258446057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1066234022.

The product of its (nonzero) digits is 537600, while the sum is 43.

The spelling of 20258446057 in words is "twenty billion, two hundred fifty-eight million, four hundred forty-six thousand, fifty-seven".