20131337280 has 56 divisors (see below), whose sum is σ = 63916998912. Its totient is φ = 5368356352.

The previous prime is 20131337267. The next prime is 20131337323. The reversal of 20131337280 is 8273313102.

It is a super-3 number, since 3×20131337280³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10484112 + ... + 10486031.

Almost surely, 2^20131337280 is an apocalyptic number.

20131337280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20131337280 is an abundant number, since it is smaller than the sum of its proper divisors (43785661632).

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

20131337280 is a wasteful number, since it uses less digits than its factorization.

20131337280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20970163 (or 20970153 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 30.

The spelling of 20131337280 in words is "twenty billion, one hundred thirty-one million, three hundred thirty-seven thousand, two hundred eighty".