19253706978 has 32 divisors (see below), whose sum is σ = 42045656832. Its totient is φ = 5829238800.

The previous prime is 19253706971. The next prime is 19253707021. The reversal of 19253706978 is 87960735291.

19253706978 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (19253706971) 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, 55768 + ... + 204003.

It is an arithmetic number, because the mean of its divisors is an integer number (1313926776).

Almost surely, 2^19253706978 is an apocalyptic number.

19253706978 is an abundant number, since it is smaller than the sum of its proper divisors (22791949854).

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

19253706978 is a wasteful number, since it uses less digits than its factorization.

19253706978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260910.

The product of its (nonzero) digits is 5715360, while the sum is 57.

The spelling of 19253706978 in words is "nineteen billion, two hundred fifty-three million, seven hundred six thousand, nine hundred seventy-eight".