21938674752002 has 6 divisors (see below), whose sum is σ = 32908022064003. Its totient is φ = 10969334064002.

The previous prime is 21938674751921. The next prime is 21938674752011. The reversal of 21938674752002 is 20025747683912.

It can be written as a sum of positive squares in only one way, i.e., 10969337376001 + 10969337376001 = 3311999^2 + 3311999^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=3311999.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 4967999 + ... + 8279997.

It is a 1-persistent number, because it is pandigital, but 2⋅21938674752002 = 43877349504004 is not.

Almost surely, 2^{21938674752002} is an apocalyptic number.

21938674752002 is a deficient number, since it is larger than the sum of its proper divisors (10969347312001).

21938674752002 is an frugal number, since it uses more digits than its factorization.

21938674752002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6624000 (or 3312001 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 56.

The spelling of 21938674752002 in words is "twenty-one trillion, nine hundred thirty-eight billion, six hundred seventy-four million, seven hundred fifty-two thousand, two".