20598277442 has 4 divisors (see below), whose sum is σ = 30897416166. Its totient is φ = 10299138720.

The previous prime is 20598277421. The next prime is 20598277489. The reversal of 20598277442 is 24477289502.

It is a Cunningham number, because it is equal to 143521²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24477289502 = 2 ⋅12238644751.

It can be written as a sum of positive squares in only one way, i.e., 20598277441 + 1 = 143521^2 + 1^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5149569359 + ... + 5149569362.

Almost surely, 2^20598277442 is an apocalyptic number.

20598277442 is a deficient number, since it is larger than the sum of its proper divisors (10299138724).

20598277442 is a wasteful number, since it uses less digits than its factorization.

20598277442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10299138723.

The product of its (nonzero) digits is 2257920, while the sum is 50.

The spelling of 20598277442 in words is "twenty billion, five hundred ninety-eight million, two hundred seventy-seven thousand, four hundred forty-two".