20154513406402 has 16 divisors (see below), whose sum is σ = 30314778708600. Its totient is φ = 10049610396672.

The previous prime is 20154513406399. The next prime is 20154513406451. The reversal of 20154513406402 is 20460431545102.

It can be written as a sum of positive squares in 4 ways, for example, as 19984842734481 + 169670671921 = 4470441^2 + 411911^2 .

It is a super-2 number, since 2×20154513406402² (a number of 27 digits) contains 22 as substring.

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, 4069593 + ... + 7541260.

Almost surely, 2^{20154513406402} is an apocalyptic number.

20154513406402 is a deficient number, since it is larger than the sum of its proper divisors (10160265302198).

20154513406402 is a wasteful number, since it uses less digits than its factorization.

20154513406402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11613237.

The product of its (nonzero) digits is 115200, while the sum is 37.

The spelling of 20154513406402 in words is "twenty trillion, one hundred fifty-four billion, five hundred thirteen million, four hundred six thousand, four hundred two".