19955767458 has 48 divisors (see below), whose sum is σ = 46450303200. Its totient is φ = 5691480960.

The previous prime is 19955767457. The next prime is 19955767463. The reversal of 19955767458 is 85476755991.

It is a Harshad number since it is a multiple of its sum of digits (66).

It is not an unprimeable number, because it can be changed into a prime (19955767451) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 796108 + ... + 820791.

It is an arithmetic number, because the mean of its divisors is an integer number (967714650).

Almost surely, 2^19955767458 is an apocalyptic number.

19955767458 is an abundant number, since it is smaller than the sum of its proper divisors (26494535742).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

19955767458 is a wasteful number, since it uses less digits than its factorization.

19955767458 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1616943 (or 1616932 counting only the distinct ones).

The product of its digits is 95256000, while the sum is 66.

The spelling of 19955767458 in words is "nineteen billion, nine hundred fifty-five million, seven hundred sixty-seven thousand, four hundred fifty-eight".