20021742237 has 16 divisors (see below), whose sum is σ = 30742221312. Its totient is φ = 11353658160.

The previous prime is 20021742211. The next prime is 20021742239. The reversal of 20021742237 is 73224712002.

It is not a de Polignac number, because 20021742237 - 2¹⁴ = 20021725853 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20021742239) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 3636243 + ... + 3641744.

It is an arithmetic number, because the mean of its divisors is an integer number (1921388832).

Almost surely, 2^20021742237 is an apocalyptic number.

It is an amenable number.

20021742237 is a deficient number, since it is larger than the sum of its proper divisors (10720479075).

20021742237 is a wasteful number, since it uses less digits than its factorization.

20021742237 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7278128.

The product of its (nonzero) digits is 9408, while the sum is 30.

The spelling of 20021742237 in words is "twenty billion, twenty-one million, seven hundred forty-two thousand, two hundred thirty-seven".