19634595253 has 12 divisors (see below), whose sum is σ = 24298435488. Its totient is φ = 15535063440.

The previous prime is 19634595241. The next prime is 19634595257. The reversal of 19634595253 is 35259543691.

It is not a de Polignac number, because 19634595253 - 2²¹ = 19632498101 is a prime.

It is the 140124-th Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 19634595253.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19634595257) by changing a digit.

It is a nontrivial repunit in base 140123.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8297463 + ... + 8299828.

It is an arithmetic number, because the mean of its divisors is an integer number (2024869624).

Almost surely, 2^19634595253 is an apocalyptic number.

19634595253 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

19634595253 is a deficient number, since it is larger than the sum of its proper divisors (4663840235).

19634595253 is a wasteful number, since it uses less digits than its factorization.

19634595253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16597324 (or 16597311 counting only the distinct ones).

The product of its digits is 4374000, while the sum is 52.

The spelling of 19634595253 in words is "nineteen billion, six hundred thirty-four million, five hundred ninety-five thousand, two hundred fifty-three".