29920866480 has 80 divisors (see below), whose sum is σ = 103060769760. Its totient is φ = 7978897152.

The previous prime is 29920866467. The next prime is 29920866509. The reversal of 29920866480 is 8466802992.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 6923967 + ... + 6928286.

It is an arithmetic number, because the mean of its divisors is an integer number (1288259622).

Almost surely, 2^29920866480 is an apocalyptic number.

29920866480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29920866480 is an abundant number, since it is smaller than the sum of its proper divisors (73139903280).

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

29920866480 is a wasteful number, since it uses less digits than its factorization.

29920866480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13852275 (or 13852263 counting only the distinct ones).

The product of its (nonzero) digits is 2985984, while the sum is 54.

The spelling of 29920866480 in words is "twenty-nine billion, nine hundred twenty million, eight hundred sixty-six thousand, four hundred eighty".