20029097880 has 128 divisors (see below), whose sum is σ = 72833126400. Its totient is φ = 4855536000.

The previous prime is 20029097813. The next prime is 20029097899. The reversal of 20029097880 is 8879092002.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 831096 + ... + 854855.

It is an arithmetic number, because the mean of its divisors is an integer number (569008800).

Almost surely, 2^20029097880 is an apocalyptic number.

20029097880 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20029097880 is an abundant number, since it is smaller than the sum of its proper divisors (52804028520).

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

20029097880 is a wasteful number, since it uses less digits than its factorization.

20029097880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1685982 (or 1685972 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 20029097880 in words is "twenty billion, twenty-nine million, ninety-seven thousand, eight hundred eighty".