13737152421 has 8 divisors (see below), whose sum is σ = 20351336960. Its totient is φ = 9158101596.

The previous prime is 13737152417. The next prime is 13737152449. The reversal of 13737152421 is 12425173731.

13737152421 is a `hidden beast` number, since 13 + 73 + 7 + 152 + 421 = 666.

It is not a de Polignac number, because 13737152421 - 2² = 13737152417 is a prime.

It is a super-2 number, since 2×13737152421² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13737152461) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 254391685 + ... + 254391738.

It is an arithmetic number, because the mean of its divisors is an integer number (2543917120).

Almost surely, 2^13737152421 is an apocalyptic number.

It is an amenable number.

13737152421 is a deficient number, since it is larger than the sum of its proper divisors (6614184539).

13737152421 is an equidigital number, since it uses as much as digits as its factorization.

13737152421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 508783432 (or 508783426 counting only the distinct ones).

The product of its digits is 35280, while the sum is 36.

The spelling of 13737152421 in words is "thirteen billion, seven hundred thirty-seven million, one hundred fifty-two thousand, four hundred twenty-one".