20289430704 has 160 divisors (see below), whose sum is σ = 55048976640. Its totient is φ = 6432777216.

The previous prime is 20289430673. The next prime is 20289430727. The reversal of 20289430704 is 40703498202.

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, 23785542 + ... + 23786394.

It is an arithmetic number, because the mean of its divisors is an integer number (344056104).

Almost surely, 2^20289430704 is an apocalyptic number.

20289430704 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20289430704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27524488320).

20289430704 is an abundant number, since it is smaller than the sum of its proper divisors (34759545936).

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

20289430704 is a wasteful number, since it uses less digits than its factorization.

20289430704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1187 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 39.

The spelling of 20289430704 in words is "twenty billion, two hundred eighty-nine million, four hundred thirty thousand, seven hundred four".