20337946560 has 560 divisors, whose sum is σ = 77516065440. Its totient is φ = 5046312960.

The previous prime is 20337946523. The next prime is 20337946561. The reversal of 20337946560 is 6564973302.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20337946561) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 30040942 + ... + 30041618.

Almost surely, 2^20337946560 is an apocalyptic number.

20337946560 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 20337946560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38758032720).

20337946560 is an abundant number, since it is smaller than the sum of its proper divisors (57178118880).

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

20337946560 is a wasteful number, since it uses less digits than its factorization.

20337946560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 786 (or 767 counting only the distinct ones).

The product of its (nonzero) digits is 816480, while the sum is 45.

The spelling of 20337946560 in words is "twenty billion, three hundred thirty-seven million, nine hundred forty-six thousand, five hundred sixty".