21369136146 has 32 divisors (see below), whose sum is σ = 42847833600. Its totient is φ = 7104807936.

The previous prime is 21369136111. The next prime is 21369136169. The reversal of 21369136146 is 64163196312.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21369136098 and 21369136107.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6745855 + ... + 6749021.

It is an arithmetic number, because the mean of its divisors is an integer number (1338994800).

Almost surely, 2^21369136146 is an apocalyptic number.

21369136146 is an abundant number, since it is smaller than the sum of its proper divisors (21478697454).

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

21369136146 is a wasteful number, since it uses less digits than its factorization.

21369136146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5698.

The product of its digits is 139968, while the sum is 42.

The spelling of 21369136146 in words is "twenty-one billion, three hundred sixty-nine million, one hundred thirty-six thousand, one hundred forty-six".