13651021830 has 32 divisors (see below), whose sum is σ = 32840303328. Its totient is φ = 3631622400.

The previous prime is 13651021807. The next prime is 13651021837. The reversal of 13651021830 is 3812015631.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13651021837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 527791 + ... + 553050.

It is an arithmetic number, because the mean of its divisors is an integer number (1026259479).

Almost surely, 2^13651021830 is an apocalyptic number.

13651021830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13651021830 is an abundant number, since it is smaller than the sum of its proper divisors (19189281498).

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

13651021830 is a wasteful number, since it uses less digits than its factorization.

13651021830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1081272.

The product of its (nonzero) digits is 4320, while the sum is 30.

The spelling of 13651021830 in words is "thirteen billion, six hundred fifty-one million, twenty-one thousand, eight hundred thirty".