19858782745 has 16 divisors (see below), whose sum is σ = 24618424320. Its totient is φ = 15362568000.

The previous prime is 19858782737. The next prime is 19858782761. The reversal of 19858782745 is 54728785891.

It is not a de Polignac number, because 19858782745 - 2³ = 19858782737 is a prime.

It is a super-2 number, since 2×19858782745² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152416 + ... + 250894.

It is an arithmetic number, because the mean of its divisors is an integer number (1538651520).

Almost surely, 2^19858782745 is an apocalyptic number.

It is an amenable number.

19858782745 is a deficient number, since it is larger than the sum of its proper divisors (4759641575).

19858782745 is a wasteful number, since it uses less digits than its factorization.

19858782745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99816.

The product of its digits is 45158400, while the sum is 64.

The spelling of 19858782745 in words is "nineteen billion, eight hundred fifty-eight million, seven hundred eighty-two thousand, seven hundred forty-five".