20247556256072 has 32 divisors (see below), whose sum is σ = 38865235332000. Its totient is φ = 9883713861504.

The previous prime is 20247556256023. The next prime is 20247556256101. The reversal of 20247556256072 is 27065265574202.

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, 13036322 + ... + 14506577.

It is an arithmetic number, because the mean of its divisors is an integer number (1214538604125).

Almost surely, 2^{20247556256072} is an apocalyptic number.

It is an amenable number.

20247556256072 is a deficient number, since it is larger than the sum of its proper divisors (18617679075928).

20247556256072 is a wasteful number, since it uses less digits than its factorization.

20247556256072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27545085 (or 27545081 counting only the distinct ones).

The product of its (nonzero) digits is 14112000, while the sum is 53.

The spelling of 20247556256072 in words is "twenty trillion, two hundred forty-seven billion, five hundred fifty-six million, two hundred fifty-six thousand, seventy-two".