20356607490 has 64 divisors (see below), whose sum is σ = 49154688000. Its totient is φ = 5395287744.

The previous prime is 20356607489. The next prime is 20356607519. The reversal of 20356607490 is 9470665302.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10285321 + ... + 10287299.

It is an arithmetic number, because the mean of its divisors is an integer number (768042000).

Almost surely, 2^20356607490 is an apocalyptic number.

20356607490 is an abundant number, since it is smaller than the sum of its proper divisors (28798080510).

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

20356607490 is a wasteful number, since it uses less digits than its factorization.

20356607490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911.

The product of its (nonzero) digits is 272160, while the sum is 42.

The spelling of 20356607490 in words is "twenty billion, three hundred fifty-six million, six hundred seven thousand, four hundred ninety".