20221012423 has 4 divisors (see below), whose sum is σ = 21410483760. Its totient is φ = 19031541088.

The previous prime is 20221012397. The next prime is 20221012451. The reversal of 20221012423 is 32421012202.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20221012423 - 2³³ = 11631077831 is a prime.

It is a super-2 number, since 2×20221012423² (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 20221012423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20221012463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 594735643 + ... + 594735676.

It is an arithmetic number, because the mean of its divisors is an integer number (5352620940).

Almost surely, 2^20221012423 is an apocalyptic number.

20221012423 is a deficient number, since it is larger than the sum of its proper divisors (1189471337).

20221012423 is a wasteful number, since it uses less digits than its factorization.

20221012423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1189471336.

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

Adding to 20221012423 its reverse (32421012202), we get a palindrome (52642024625).

The spelling of 20221012423 in words is "twenty billion, two hundred twenty-one million, twelve thousand, four hundred twenty-three".