20899562042 has 4 divisors (see below), whose sum is σ = 31349343066. Its totient is φ = 10449781020.

The previous prime is 20899562039. The next prime is 20899562077. The reversal of 20899562042 is 24026599802.

20899562042 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

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., 11863348561 + 9036213481 = 108919^2 + 95059^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5224890509 + ... + 5224890512.

Almost surely, 2^20899562042 is an apocalyptic number.

20899562042 is a deficient number, since it is larger than the sum of its proper divisors (10449781024).

20899562042 is a wasteful number, since it uses less digits than its factorization.

20899562042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10449781023.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 20899562042 in words is "twenty billion, eight hundred ninety-nine million, five hundred sixty-two thousand, forty-two".