20191272956 has 6 divisors (see below), whose sum is σ = 35334727680. Its totient is φ = 10095636476.

The previous prime is 20191272883. The next prime is 20191272973. The reversal of 20191272956 is 65927219102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2523909116 + ... + 2523909123.

It is an arithmetic number, because the mean of its divisors is an integer number (5889121280).

Almost surely, 2^20191272956 is an apocalyptic number.

It is an amenable number.

20191272956 is a deficient number, since it is larger than the sum of its proper divisors (15143454724).

20191272956 is a wasteful number, since it uses less digits than its factorization.

20191272956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5047818243 (or 5047818241 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 44.

The spelling of 20191272956 in words is "twenty billion, one hundred ninety-one million, two hundred seventy-two thousand, nine hundred fifty-six".