19779541432 has 32 divisors (see below), whose sum is σ = 42469056000. Its totient is φ = 8460081504.

The previous prime is 19779541427. The next prime is 19779541459. The reversal of 19779541432 is 23414597791.

It is a super-2 number, since 2×19779541432² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 19779541432.

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, 322932 + ... + 379267.

It is an arithmetic number, because the mean of its divisors is an integer number (1327158000).

Almost surely, 2^19779541432 is an apocalyptic number.

It is an amenable number.

19779541432 is an abundant number, since it is smaller than the sum of its proper divisors (22689514568).

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

19779541432 is a wasteful number, since it uses less digits than its factorization.

19779541432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702715 (or 702711 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 52.

The spelling of 19779541432 in words is "nineteen billion, seven hundred seventy-nine million, five hundred forty-one thousand, four hundred thirty-two".