20154990951136 has 48 divisors (see below), whose sum is σ = 42018037906320. Its totient is φ = 9483849717760.

The previous prime is 20154990951107. The next prime is 20154990951181. The reversal of 20154990951136 is 63115909945102.

It is a congruent number.

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, 4418730 + ... + 7735318.

It is an arithmetic number, because the mean of its divisors is an integer number (875375789715).

Almost surely, 2^{20154990951136} is an apocalyptic number.

It is an amenable number.

20154990951136 is an abundant number, since it is smaller than the sum of its proper divisors (21863046955184).

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

20154990951136 is a wasteful number, since it uses less digits than its factorization.

20154990951136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3327787 (or 3327779 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 55.

The spelling of 20154990951136 in words is "twenty trillion, one hundred fifty-four billion, nine hundred ninety million, nine hundred fifty-one thousand, one hundred thirty-six".