21230002000138 has 32 divisors (see below), whose sum is σ = 33345994429440. Its totient is φ = 10124633232000.

The previous prime is 21230002000133. The next prime is 21230002000159. The reversal of 21230002000138 is 83100020003212.

It is not an unprimeable number, because it can be changed into a prime (21230002000133) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12910198 + ... + 14461438.

It is an arithmetic number, because the mean of its divisors is an integer number (1042062325920).

Almost surely, 2^{21230002000138} is an apocalyptic number.

21230002000138 is a deficient number, since it is larger than the sum of its proper divisors (12115992429302).

21230002000138 is a wasteful number, since it uses less digits than its factorization.

21230002000138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554454.

The product of its (nonzero) digits is 576, while the sum is 22.

The spelling of 21230002000138 in words is "twenty-one trillion, two hundred thirty billion, two million, one hundred thirty-eight", and thus it is an aban number.