19700509650 has 48 divisors (see below), whose sum is σ = 48980478144. Its totient is φ = 5240220480.

The previous prime is 19700509607. The next prime is 19700509663. The reversal of 19700509650 is 5690500791.

It is a super-2 number, since 2×19700509650² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 105862 + ... + 224961.

It is an arithmetic number, because the mean of its divisors is an integer number (1020426628).

Almost surely, 2^19700509650 is an apocalyptic number.

19700509650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

19700509650 is an abundant number, since it is smaller than the sum of its proper divisors (29279968494).

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

19700509650 is a wasteful number, since it uses less digits than its factorization.

19700509650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331235 (or 331230 counting only the distinct ones).

The product of its (nonzero) digits is 85050, while the sum is 42.

The spelling of 19700509650 in words is "nineteen billion, seven hundred million, five hundred nine thousand, six hundred fifty".