20151256736254 has 64 divisors (see below), whose sum is σ = 35038088257536. Its totient is φ = 8513461291104.

The previous prime is 20151256736213. The next prime is 20151256736353. The reversal of 20151256736254 is 45263765215102.

It is a junction number, because it is equal to n+sod(n) for n = 20151256736198 and 20151256736207.

It is a congruent number.

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, 1100731369 + ... + 1100749675.

It is an arithmetic number, because the mean of its divisors is an integer number (547470129024).

Almost surely, 2^{20151256736254} is an apocalyptic number.

20151256736254 is a deficient number, since it is larger than the sum of its proper divisors (14886831521282).

20151256736254 is a wasteful number, since it uses less digits than its factorization.

20151256736254 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20429.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 20151256736254 in words is "twenty trillion, one hundred fifty-one billion, two hundred fifty-six million, seven hundred thirty-six thousand, two hundred fifty-four".