19922391428 has 24 divisors (see below), whose sum is σ = 36338265600. Its totient is φ = 9546269760.

The previous prime is 19922391427. The next prime is 19922391457. The reversal of 19922391428 is 82419322991.

It is not an unprimeable number, because it can be changed into a prime (19922391421) 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, 767153 + ... + 792696.

It is an arithmetic number, because the mean of its divisors is an integer number (1514094400).

Almost surely, 2^19922391428 is an apocalyptic number.

It is an amenable number.

19922391428 is a deficient number, since it is larger than the sum of its proper divisors (16415874172).

19922391428 is a wasteful number, since it uses less digits than its factorization.

19922391428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1559987 (or 1559985 counting only the distinct ones).

The product of its digits is 559872, while the sum is 50.

The spelling of 19922391428 in words is "nineteen billion, nine hundred twenty-two million, three hundred ninety-one thousand, four hundred twenty-eight".