10202987864 has 64 divisors (see below), whose sum is σ = 20198082240. Its totient is φ = 4822343680.

The previous prime is 10202987831. The next prime is 10202987891. The reversal of 10202987864 is 46878920201.

It is a happy number.

It is a super-2 number, since 2×10202987864² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11580704 + ... + 11581584.

It is an arithmetic number, because the mean of its divisors is an integer number (315595035).

Almost surely, 2^10202987864 is an apocalyptic number.

It is an amenable number.

10202987864 is a deficient number, since it is larger than the sum of its proper divisors (9995094376).

10202987864 is a wasteful number, since it uses less digits than its factorization.

10202987864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1576 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The spelling of 10202987864 in words is "ten billion, two hundred two million, nine hundred eighty-seven thousand, eight hundred sixty-four".