20615634002 has 4 divisors (see below), whose sum is σ = 30923451006. Its totient is φ = 10307817000.

The previous prime is 20615633977. The next prime is 20615634041. The reversal of 20615634002 is 20043651602.

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., 18594322321 + 2021311681 = 136361^2 + 44959^2 .

It is a super-3 number, since 3×20615634002³ (a number of 32 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5153908499 + ... + 5153908502.

Almost surely, 2^20615634002 is an apocalyptic number.

20615634002 is a deficient number, since it is larger than the sum of its proper divisors (10307817004).

20615634002 is a wasteful number, since it uses less digits than its factorization.

20615634002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10307817003.

The product of its (nonzero) digits is 8640, while the sum is 29.

The spelling of 20615634002 in words is "twenty billion, six hundred fifteen million, six hundred thirty-four thousand, two".