21652155202 has 4 divisors (see below), whose sum is σ = 32478232806. Its totient is φ = 10826077600.

The previous prime is 21652155181. The next prime is 21652155211. The reversal of 21652155202 is 20255125612.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 11295225841 + 10356929361 = 106279^2 + 101769^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5413038799 + ... + 5413038802.

Almost surely, 2^21652155202 is an apocalyptic number.

21652155202 is a deficient number, since it is larger than the sum of its proper divisors (10826077604).

21652155202 is a wasteful number, since it uses less digits than its factorization.

21652155202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10826077603.

The product of its (nonzero) digits is 12000, while the sum is 31.

The spelling of 21652155202 in words is "twenty-one billion, six hundred fifty-two million, one hundred fifty-five thousand, two hundred two".