19885898424 has 64 divisors (see below), whose sum is σ = 56837226240. Its totient is φ = 5679648000.

The previous prime is 19885898353. The next prime is 19885898449. The reversal of 19885898424 is 42489858891.

It is a super-2 number, since 2×19885898424² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 484447 + ... + 523889.

It is an arithmetic number, because the mean of its divisors is an integer number (888081660).

Almost surely, 2^19885898424 is an apocalyptic number.

19885898424 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

19885898424 is an abundant number, since it is smaller than the sum of its proper divisors (36951327816).

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

19885898424 is a wasteful number, since it uses less digits than its factorization.

19885898424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42460 (or 42456 counting only the distinct ones).

The product of its digits is 53084160, while the sum is 66.

The spelling of 19885898424 in words is "nineteen billion, eight hundred eighty-five million, eight hundred ninety-eight thousand, four hundred twenty-four".