20449231320 has 128 divisors (see below), whose sum is σ = 74235916800. Its totient is φ = 4399159296.

The previous prime is 20449231301. The next prime is 20449231333. The reversal of 20449231320 is 2313294402.

It is a Harshad number since it is a multiple of its sum of digits (30).

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, 701730 + ... + 730289.

It is an arithmetic number, because the mean of its divisors is an integer number (579968100).

Almost surely, 2^20449231320 is an apocalyptic number.

20449231320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20449231320 is an abundant number, since it is smaller than the sum of its proper divisors (53786685480).

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

20449231320 is a wasteful number, since it uses less digits than its factorization.

20449231320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1432057 (or 1432053 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 30.

The spelling of 20449231320 in words is "twenty billion, four hundred forty-nine million, two hundred thirty-one thousand, three hundred twenty".