29772420956 has 48 divisors (see below), whose sum is σ = 56815825920. Its totient is φ = 13598928000.

The previous prime is 29772420947. The next prime is 29772420971. The reversal of 29772420956 is 65902427792.

It is a junction number, because it is equal to n+sod(n) for n = 29772420898 and 29772420907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 639551 + ... + 684521.

It is an arithmetic number, because the mean of its divisors is an integer number (1183663040).

Almost surely, 2^29772420956 is an apocalyptic number.

It is an amenable number.

29772420956 is a deficient number, since it is larger than the sum of its proper divisors (27043404964).

29772420956 is a wasteful number, since it uses less digits than its factorization.

29772420956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45306 (or 45304 counting only the distinct ones).

The product of its (nonzero) digits is 3810240, while the sum is 53.

It can be divided in two parts, 297724 and 20956, that multiplied together give a square (6239104144 = 78988²).

The spelling of 29772420956 in words is "twenty-nine billion, seven hundred seventy-two million, four hundred twenty thousand, nine hundred fifty-six".