20816993122 has 4 divisors (see below), whose sum is σ = 31225489686. Its totient is φ = 10408496560.

The previous prime is 20816993089. The next prime is 20816993159. The reversal of 20816993122 is 22139961802.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13092165241 + 7724827881 = 114421^2 + 87891^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5204248279 + ... + 5204248282.

Almost surely, 2^20816993122 is an apocalyptic number.

20816993122 is a deficient number, since it is larger than the sum of its proper divisors (10408496564).

20816993122 is a wasteful number, since it uses less digits than its factorization.

20816993122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10408496563.

The product of its (nonzero) digits is 93312, while the sum is 43.

The spelling of 20816993122 in words is "twenty billion, eight hundred sixteen million, nine hundred ninety-three thousand, one hundred twenty-two".