20342256690 has 64 divisors (see below), whose sum is σ = 56468192256. Its totient is φ = 4593634752.

The previous prime is 20342256679. The next prime is 20342256703. The reversal of 20342256690 is 9665224302.

It is a super-2 number, since 2×20342256690² (a number of 21 digits) contains 22 as substring.

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, 566112 + ... + 600971.

It is an arithmetic number, because the mean of its divisors is an integer number (882315504).

Almost surely, 2^20342256690 is an apocalyptic number.

20342256690 is an abundant number, since it is smaller than the sum of its proper divisors (36125935566).

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

20342256690 is a wasteful number, since it uses less digits than its factorization.

20342256690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1167183.

The product of its (nonzero) digits is 155520, while the sum is 39.

The spelling of 20342256690 in words is "twenty billion, three hundred forty-two million, two hundred fifty-six thousand, six hundred ninety".