20397222388 has 24 divisors (see below), whose sum is σ = 37327627008. Its totient is φ = 9734103456.

The previous prime is 20397222383. The next prime is 20397222401. The reversal of 20397222388 is 88322279302.

It is a super-2 number, since 2×20397222388² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (46).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20397222383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 196831 + ... + 282022.

It is an arithmetic number, because the mean of its divisors is an integer number (1555317792).

Almost surely, 2^20397222388 is an apocalyptic number.

It is an amenable number.

20397222388 is a deficient number, since it is larger than the sum of its proper divisors (16930404620).

20397222388 is a wasteful number, since it uses less digits than its factorization.

20397222388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 479343 (or 479341 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The spelling of 20397222388 in words is "twenty billion, three hundred ninety-seven million, two hundred twenty-two thousand, three hundred eighty-eight".