20237057642 has 4 divisors (see below), whose sum is σ = 30355586466. Its totient is φ = 10118528820.

The previous prime is 20237057629. The next prime is 20237057663. The reversal of 20237057642 is 24675073202.

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., 19234638721 + 1002418921 = 138689^2 + 31661^2 .

It is a junction number, because it is equal to n+sod(n) for n = 20237057596 and 20237057605.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5059264409 + ... + 5059264412.

Almost surely, 2^20237057642 is an apocalyptic number.

20237057642 is a deficient number, since it is larger than the sum of its proper divisors (10118528824).

20237057642 is a wasteful number, since it uses less digits than its factorization.

20237057642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10118528823.

The product of its (nonzero) digits is 141120, while the sum is 38.

The spelling of 20237057642 in words is "twenty billion, two hundred thirty-seven million, fifty-seven thousand, six hundred forty-two".