19801067912 has 16 divisors (see below), whose sum is σ = 37157229900. Its totient is φ = 9892473280.

The previous prime is 19801067903. The next prime is 19801067927. The reversal of 19801067912 is 21976010891.

It can be written as a sum of positive squares in 2 ways, for example, as 16447036516 + 3354031396 = 128246^2 + 57914^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 997139 + ... + 1016802.

Almost surely, 2^19801067912 is an apocalyptic number.

It is an amenable number.

19801067912 is a deficient number, since it is larger than the sum of its proper divisors (17356161988).

19801067912 is a wasteful number, since it uses less digits than its factorization.

19801067912 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2015176 (or 2015172 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 44.

The spelling of 19801067912 in words is "nineteen billion, eight hundred one million, sixty-seven thousand, nine hundred twelve".