20187002002 has 24 divisors (see below), whose sum is σ = 32607190836. Its totient is φ = 9369612288.

The previous prime is 20187001981. The next prime is 20187002021. The reversal of 20187002002 is 20020078102.

It can be written as a sum of positive squares in 6 ways, for example, as 10447088521 + 9739913481 = 102211^2 + 98691^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197023 + ... + 281410.

Almost surely, 2^20187002002 is an apocalyptic number.

20187002002 is a deficient number, since it is larger than the sum of its proper divisors (12420188834).

20187002002 is a wasteful number, since it uses less digits than its factorization.

20187002002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478542 (or 478525 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 22.

The spelling of 20187002002 in words is "twenty billion, one hundred eighty-seven million, two thousand, two".