19912310102 has 4 divisors (see below), whose sum is σ = 29868465156. Its totient is φ = 9956155050.

The previous prime is 19912310087. The next prime is 19912310147. The reversal of 19912310102 is 20101321991.

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

It is a super-2 number, since 2×19912310102² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4978077524 + ... + 4978077527.

It is an arithmetic number, because the mean of its divisors is an integer number (7467116289).

Almost surely, 2^19912310102 is an apocalyptic number.

19912310102 is a deficient number, since it is larger than the sum of its proper divisors (9956155054).

19912310102 is an equidigital number, since it uses as much as digits as its factorization.

19912310102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9956155053.

The product of its (nonzero) digits is 972, while the sum is 29.

The spelling of 19912310102 in words is "nineteen billion, nine hundred twelve million, three hundred ten thousand, one hundred two".