20431222370 has 64 divisors (see below), whose sum is σ = 42241572576. Its totient is φ = 7048151040.

The previous prime is 20431222351. The next prime is 20431222379. The reversal of 20431222370 is 7322213402.

It is a happy number.

It can be written as a sum of positive squares in 16 ways, for example, as 7164098881 + 13267123489 = 84641^2 + 115183^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (20431222379) 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 31 ways as a sum of consecutive naturals, for example, 269030 + ... + 336510.

Almost surely, 2^20431222370 is an apocalyptic number.

20431222370 is an abundant number, since it is smaller than the sum of its proper divisors (21810350206).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20431222370 is a wasteful number, since it uses less digits than its factorization.

20431222370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67655.

The product of its (nonzero) digits is 4032, while the sum is 26.

Adding to 20431222370 its reverse (7322213402), we get a palindrome (27753435772).

The spelling of 20431222370 in words is "twenty billion, four hundred thirty-one million, two hundred twenty-two thousand, three hundred seventy".