19779922026 has 12 divisors (see below), whose sum is σ = 42856497762. Its totient is φ = 6593307336.

The previous prime is 19779921949. The next prime is 19779922061. The reversal of 19779922026 is 62022997791.

It can be written as a sum of positive squares in only one way, i.e., 17570828025 + 2209094001 = 132555^2 + 47001^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 549442261 + ... + 549442296.

Almost surely, 2^19779922026 is an apocalyptic number.

19779922026 is an abundant number, since it is smaller than the sum of its proper divisors (23076575736).

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

19779922026 is a wasteful number, since it uses less digits than its factorization.

19779922026 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1098884565 (or 1098884562 counting only the distinct ones).

The product of its (nonzero) digits is 1714608, while the sum is 54.

The spelling of 19779922026 in words is "nineteen billion, seven hundred seventy-nine million, nine hundred twenty-two thousand, twenty-six".