19121094634 has 4 divisors (see below), whose sum is σ = 28681641954. Its totient is φ = 9560547316.

The previous prime is 19121094631. The next prime is 19121094649. The reversal of 19121094634 is 43649012191.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13958241025 + 5162853609 = 118145^2 + 71853^2 .

It is not an unprimeable number, because it can be changed into a prime (19121094631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4780273657 + ... + 4780273660.

Almost surely, 2^19121094634 is an apocalyptic number.

19121094634 is a deficient number, since it is larger than the sum of its proper divisors (9560547320).

19121094634 is an equidigital number, since it uses as much as digits as its factorization.

19121094634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9560547319.

The product of its (nonzero) digits is 46656, while the sum is 40.

The spelling of 19121094634 in words is "nineteen billion, one hundred twenty-one million, ninety-four thousand, six hundred thirty-four".