19957000994 has 32 divisors (see below), whose sum is σ = 34556261376. Its totient is φ = 8467364160.

The previous prime is 19957000981. The next prime is 19957000997. The reversal of 19957000994 is 49900075991.

It is not an unprimeable number, because it can be changed into a prime (19957000997) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 547424 + ... + 582740.

It is an arithmetic number, because the mean of its divisors is an integer number (1079883168).

Almost surely, 2^19957000994 is an apocalyptic number.

19957000994 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

19957000994 is a deficient number, since it is larger than the sum of its proper divisors (14599260382).

19957000994 is a wasteful number, since it uses less digits than its factorization.

19957000994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35730.

The product of its (nonzero) digits is 918540, while the sum is 53.

The spelling of 19957000994 in words is "nineteen billion, nine hundred fifty-seven million, nine hundred ninety-four", and thus it is an aban number.