20783911298 has 4 divisors (see below), whose sum is σ = 31175866950. Its totient is φ = 10391955648.

The previous prime is 20783911283. The next prime is 20783911331. The reversal of 20783911298 is 89211938702.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 89211938702 = 2 ⋅44605969351.

It can be written as a sum of positive squares in only one way, i.e., 20653426369 + 130484929 = 143713^2 + 11423^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5195977823 + ... + 5195977826.

Almost surely, 2^20783911298 is an apocalyptic number.

20783911298 is a deficient number, since it is larger than the sum of its proper divisors (10391955652).

20783911298 is a wasteful number, since it uses less digits than its factorization.

20783911298 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10391955651.

The product of its (nonzero) digits is 435456, while the sum is 50.

The spelling of 20783911298 in words is "twenty billion, seven hundred eighty-three million, nine hundred eleven thousand, two hundred ninety-eight".