20023463621 has 4 divisors (see below), whose sum is σ = 22883958432. Its totient is φ = 17162968812.

The previous prime is 20023463599. The next prime is 20023463623. The reversal of 20023463621 is 12636432002.

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 20023463621 - 2¹⁴ = 20023447237 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20023463623) 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, 1430247395 + ... + 1430247408.

It is an arithmetic number, because the mean of its divisors is an integer number (5720989608).

Almost surely, 2^20023463621 is an apocalyptic number.

It is an amenable number.

20023463621 is a deficient number, since it is larger than the sum of its proper divisors (2860494811).

20023463621 is an equidigital number, since it uses as much as digits as its factorization.

20023463621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2860494810.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 20023463621 its reverse (12636432002), we get a palindrome (32659895623).

The spelling of 20023463621 in words is "twenty billion, twenty-three million, four hundred sixty-three thousand, six hundred twenty-one".