20445642530 has 16 divisors (see below), whose sum is σ = 36820566144. Its totient is φ = 8174166000.

The previous prime is 20445642491. The next prime is 20445642599. The reversal of 20445642530 is 3524654402.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 490346 + ... + 530405.

It is an arithmetic number, because the mean of its divisors is an integer number (2301285384).

Almost surely, 2^20445642530 is an apocalyptic number.

20445642530 is a deficient number, since it is larger than the sum of its proper divisors (16374923614).

20445642530 is a wasteful number, since it uses less digits than its factorization.

20445642530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1022761.

The product of its (nonzero) digits is 115200, while the sum is 35.

The spelling of 20445642530 in words is "twenty billion, four hundred forty-five million, six hundred forty-two thousand, five hundred thirty".