20387699370 has 24 divisors (see below), whose sum is σ = 53008018596. Its totient is φ = 5436719808.

The previous prime is 20387699359. The next prime is 20387699417. The reversal of 20387699370 is 7399678302.

20387699370 is a `hidden beast` number, since 203 + 8 + 7 + 69 + 9 + 370 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18728196201 + 1659503169 = 136851^2 + 40737^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113264907 + ... + 113265086.

Almost surely, 2^20387699370 is an apocalyptic number.

20387699370 is an abundant number, since it is smaller than the sum of its proper divisors (32620319226).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20387699370 is a wasteful number, since it uses less digits than its factorization.

20387699370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226530006 (or 226530003 counting only the distinct ones).

The product of its (nonzero) digits is 3429216, while the sum is 54.

The spelling of 20387699370 in words is "twenty billion, three hundred eighty-seven million, six hundred ninety-nine thousand, three hundred seventy".