20623044465 has 24 divisors (see below), whose sum is σ = 36250089408. Its totient is φ = 10844040480.

The previous prime is 20623044457. The next prime is 20623044521. The reversal of 20623044465 is 56444032602.

20623044465 is a `hidden beast` number, since 20 + 623 + 0 + 4 + 4 + 4 + 6 + 5 = 666.

It is not a de Polignac number, because 20623044465 - 2³ = 20623044457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3224199 + ... + 3230588.

It is an arithmetic number, because the mean of its divisors is an integer number (1510420392).

Almost surely, 2^20623044465 is an apocalyptic number.

It is an amenable number.

20623044465 is a deficient number, since it is larger than the sum of its proper divisors (15627044943).

20623044465 is a wasteful number, since it uses less digits than its factorization.

20623044465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6454869 (or 6454866 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The spelling of 20623044465 in words is "twenty billion, six hundred twenty-three million, forty-four thousand, four hundred sixty-five".