20401333423 has 4 divisors (see below), whose sum is σ = 20408306400. Its totient is φ = 20394360448.

The previous prime is 20401333417. The next prime is 20401333457. The reversal of 20401333423 is 32433310402.

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 20401333423 - 2²⁹ = 19864462511 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 (20401333723) 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, 3482098 + ... + 3487951.

It is an arithmetic number, because the mean of its divisors is an integer number (5102076600).

Almost surely, 2^20401333423 is an apocalyptic number.

20401333423 is a deficient number, since it is larger than the sum of its proper divisors (6972977).

20401333423 is an equidigital number, since it uses as much as digits as its factorization.

20401333423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6972976.

The product of its (nonzero) digits is 5184, while the sum is 25.

Adding to 20401333423 its reverse (32433310402), we get a palindrome (52834643825).

The spelling of 20401333423 in words is "twenty billion, four hundred one million, three hundred thirty-three thousand, four hundred twenty-three".