12537019620 has 240 divisors, whose sum is σ = 40378238208. Its totient is φ = 3255033600.

The previous prime is 12537019619. The next prime is 12537019633. The reversal of 12537019620 is 2691073521.

12537019620 is a `hidden beast` number, since 1 + 25 + 3 + 7 + 0 + 1 + 9 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 12964377 + ... + 12965343.

Almost surely, 2^12537019620 is an apocalyptic number.

12537019620 is a gapful number since it is divisible by the number (10) 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 12537019620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (20189119104).

12537019620 is an abundant number, since it is smaller than the sum of its proper divisors (27841218588).

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

12537019620 is a wasteful number, since it uses less digits than its factorization.

12537019620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192 (or 1181 counting only the distinct ones).

The product of its (nonzero) digits is 22680, while the sum is 36.

The spelling of 12537019620 in words is "twelve billion, five hundred thirty-seven million, nineteen thousand, six hundred twenty".