20122432021 has 4 divisors (see below), whose sum is σ = 20174971392. Its totient is φ = 20069892652.

The previous prime is 20122432003. The next prime is 20122432061. The reversal of 20122432021 is 12023422102.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 20122432021 - 2⁷ = 20122431893 is a prime.

It is a super-2 number, since 2×20122432021² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20122432021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20122432061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26269111 + ... + 26269876.

It is an arithmetic number, because the mean of its divisors is an integer number (5043742848).

Almost surely, 2^20122432021 is an apocalyptic number.

It is an amenable number.

20122432021 is a deficient number, since it is larger than the sum of its proper divisors (52539371).

20122432021 is an equidigital number, since it uses as much as digits as its factorization.

20122432021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52539370.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20122432021 its reverse (12023422102), we get a palindrome (32145854123).

The spelling of 20122432021 in words is "twenty billion, one hundred twenty-two million, four hundred thirty-two thousand, twenty-one".