20009036784 has 80 divisors (see below), whose sum is σ = 56411639424. Its totient is φ = 6060921600.

The previous prime is 20009036777. The next prime is 20009036797. The reversal of 20009036784 is 48763090002.

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, 1664074 + ... + 1676054.

Almost surely, 2^20009036784 is an apocalyptic number.

20009036784 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

20009036784 is an abundant number, since it is smaller than the sum of its proper divisors (36402602640).

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

20009036784 is a wasteful number, since it uses less digits than its factorization.

20009036784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15166 (or 15160 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 39.

The spelling of 20009036784 in words is "twenty billion, nine million, thirty-six thousand, seven hundred eighty-four".