21423023001 has 6 divisors (see below), whose sum is σ = 30944366570. Its totient is φ = 14282015328.

The previous prime is 21423022987. The next prime is 21423023023. The reversal of 21423023001 is 10032032412.

21423023001 is a `hidden beast` number, since 21 + 42 + 302 + 300 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13069976976 + 8353046025 = 114324^2 + 91395^2 .

It is not a de Polignac number, because 21423023001 - 2¹⁴ = 21423006617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21423023701) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1190167936 + ... + 1190167953.

Almost surely, 2^21423023001 is an apocalyptic number.

It is an amenable number.

21423023001 is a deficient number, since it is larger than the sum of its proper divisors (9521343569).

21423023001 is a wasteful number, since it uses less digits than its factorization.

21423023001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2380335895 (or 2380335892 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21423023001 its reverse (10032032412), we get a palindrome (31455055413).

The spelling of 21423023001 in words is "twenty-one billion, four hundred twenty-three million, twenty-three thousand, one".