19741545920 has 56 divisors (see below), whose sum is σ = 48156162768. Its totient is φ = 7704012800.

The previous prime is 19741545911. The next prime is 19741545931. The reversal of 19741545920 is 2954514791.

It is a super-2 number, since 2×19741545920² (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 7 ways as a sum of consecutive naturals, for example, 739226 + ... + 765465.

It is an arithmetic number, because the mean of its divisors is an integer number (859931478).

Almost surely, 2^19741545920 is an apocalyptic number.

19741545920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

19741545920 is an abundant number, since it is smaller than the sum of its proper divisors (28414616848).

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

19741545920 is a wasteful number, since it uses less digits than its factorization.

19741545920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1504749 (or 1504739 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 47.

The spelling of 19741545920 in words is "nineteen billion, seven hundred forty-one million, five hundred forty-five thousand, nine hundred twenty".