20555512402 has 16 divisors (see below), whose sum is σ = 30973408920. Its totient is φ = 10231112448.

The previous prime is 20555512399. The next prime is 20555512441. The reversal of 20555512402 is 20421555502.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6638827441 + 13916684961 = 81479^2 + 117969^2 .

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, 597658 + ... + 631114.

Almost surely, 2^20555512402 is an apocalyptic number.

20555512402 is a deficient number, since it is larger than the sum of its proper divisors (10417896518).

20555512402 is a wasteful number, since it uses less digits than its factorization.

20555512402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34845.

The product of its (nonzero) digits is 20000, while the sum is 31.

The spelling of 20555512402 in words is "twenty billion, five hundred fifty-five million, five hundred twelve thousand, four hundred two".