20149534391192 has 8 divisors (see below), whose sum is σ = 37780376983500. Its totient is φ = 10074767195592.

The previous prime is 20149534391183. The next prime is 20149534391213. The reversal of 20149534391192 is 29119343594102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

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, 1259345899442 + ... + 1259345899457.

Almost surely, 2^{20149534391192} is an apocalyptic number.

It is an amenable number.

20149534391192 is a deficient number, since it is larger than the sum of its proper divisors (17630842592308).

20149534391192 is a wasteful number, since it uses less digits than its factorization.

20149534391192 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2518691798905 (or 2518691798901 counting only the distinct ones).

The product of its (nonzero) digits is 2099520, while the sum is 53.

The spelling of 20149534391192 in words is "twenty trillion, one hundred forty-nine billion, five hundred thirty-four million, three hundred ninety-one thousand, one hundred ninety-two".