20512602340 has 24 divisors (see below), whose sum is σ = 43125066432. Its totient is φ = 8195783520.

The previous prime is 20512602317. The next prime is 20512602361. The reversal of 20512602340 is 4320621502.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 560406 + ... + 595885.

It is an arithmetic number, because the mean of its divisors is an integer number (1796877768).

Almost surely, 2^20512602340 is an apocalyptic number.

20512602340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20512602340 is an abundant number, since it is smaller than the sum of its proper divisors (22612464092).

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

20512602340 is a wasteful number, since it uses less digits than its factorization.

20512602340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157187 (or 1157185 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 25.

The spelling of 20512602340 in words is "twenty billion, five hundred twelve million, six hundred two thousand, three hundred forty".