20547496320 has 256 divisors, whose sum is σ = 70786759680. Its totient is φ = 5039677440.

The previous prime is 20547496309. The next prime is 20547496381. The reversal of 20547496320 is 2369474502.

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, 7761237 + ... + 7763883.

It is an arithmetic number, because the mean of its divisors is an integer number (276510780).

Almost surely, 2^20547496320 is an apocalyptic number.

20547496320 is a gapful number since it is divisible by the number (20) 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 20547496320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35393379840).

20547496320 is an abundant number, since it is smaller than the sum of its proper divisors (50239263360).

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

20547496320 is a wasteful number, since it uses less digits than its factorization.

20547496320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2993 (or 2981 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 42.

The spelling of 20547496320 in words is "twenty billion, five hundred forty-seven million, four hundred ninety-six thousand, three hundred twenty".