20445704357 has 16 divisors (see below), whose sum is σ = 23503777920. Its totient is φ = 17627803200.

The previous prime is 20445704351. The next prime is 20445704399. The reversal of 20445704357 is 75340754402.

It is a cyclic number.

It is not a de Polignac number, because 20445704357 - 2²⁸ = 20177268901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20445704351) 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, 565394 + ... + 600467.

It is an arithmetic number, because the mean of its divisors is an integer number (1468986120).

Almost surely, 2^20445704357 is an apocalyptic number.

It is an amenable number.

20445704357 is a deficient number, since it is larger than the sum of its proper divisors (3058073563).

20445704357 is a wasteful number, since it uses less digits than its factorization.

20445704357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1165964.

The product of its (nonzero) digits is 470400, while the sum is 41.

The spelling of 20445704357 in words is "twenty billion, four hundred forty-five million, seven hundred four thousand, three hundred fifty-seven".