137684021020 has 384 divisors, whose sum is σ = 387272793600. Its totient is φ = 40714813440.

The previous prime is 137684020997. The next prime is 137684021021. The reversal of 137684021020 is 20120486731.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (137684021021) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 298663590 + ... + 298664050.

It is an arithmetic number, because the mean of its divisors is an integer number (1008522900).

Almost surely, 2^137684021020 is an apocalyptic number.

137684021020 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 137684021020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193636396800).

137684021020 is an abundant number, since it is smaller than the sum of its proper divisors (249588772580).

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

137684021020 is a wasteful number, since it uses less digits than its factorization.

137684021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718 (or 702 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 137684021020 in words is "one hundred thirty-seven billion, six hundred eighty-four million, twenty-one thousand, twenty".