19640075134 has 16 divisors (see below), whose sum is σ = 29908267200. Its totient is φ = 9671279904.

The previous prime is 19640075131. The next prime is 19640075177. The reversal of 19640075134 is 43157004691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19640075131) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 93829 + ... + 219280.

It is an arithmetic number, because the mean of its divisors is an integer number (1869266700).

Almost surely, 2^19640075134 is an apocalyptic number.

19640075134 is a deficient number, since it is larger than the sum of its proper divisors (10268192066).

19640075134 is a wasteful number, since it uses less digits than its factorization.

19640075134 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313587.

The product of its (nonzero) digits is 90720, while the sum is 40.

The spelling of 19640075134 in words is "nineteen billion, six hundred forty million, seventy-five thousand, one hundred thirty-four".