20401452423 has 40 divisors (see below), whose sum is σ = 33702354576. Its totient is φ = 12195100800.

The previous prime is 20401452397. The next prime is 20401452427. The reversal of 20401452423 is 32425410402.

20401452423 is a `hidden beast` number, since 204 + 0 + 1 + 452 + 4 + 2 + 3 = 666.

It is not a de Polignac number, because 20401452423 - 2⁹ = 20401451911 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20401452427) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 91788 + ... + 221873.

Almost surely, 2^20401452423 is an apocalyptic number.

20401452423 is a deficient number, since it is larger than the sum of its proper divisors (13300902153).

20401452423 is a wasteful number, since it uses less digits than its factorization.

20401452423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 313757 (or 313748 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

Adding to 20401452423 its reverse (32425410402), we get a palindrome (52826862825).

The spelling of 20401452423 in words is "twenty billion, four hundred one million, four hundred fifty-two thousand, four hundred twenty-three".