19724732853 has 16 divisors (see below), whose sum is σ = 30241138176. Its totient is φ = 11202125040.

The previous prime is 19724732813. The next prime is 19724732861. The reversal of 19724732853 is 35823742791.

It is not a de Polignac number, because 19724732853 - 2²⁶ = 19657623989 is a prime.

It is a super-2 number, since 2×19724732853² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 19724732796 and 19724732805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (19724732803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2877783 + ... + 2884628.

It is an arithmetic number, because the mean of its divisors is an integer number (1890071136).

Almost surely, 2^19724732853 is an apocalyptic number.

It is an amenable number.

19724732853 is a deficient number, since it is larger than the sum of its proper divisors (10516405323).

19724732853 is a wasteful number, since it uses less digits than its factorization.

19724732853 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5762584.

The product of its digits is 2540160, while the sum is 51.

The spelling of 19724732853 in words is "nineteen billion, seven hundred twenty-four million, seven hundred thirty-two thousand, eight hundred fifty-three".