20423133400 has 48 divisors (see below), whose sum is σ = 47732480640. Its totient is φ = 8126467200.

The previous prime is 20423133359. The next prime is 20423133427. The reversal of 20423133400 is 433132402.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229119 + ... + 305518.

It is an arithmetic number, because the mean of its divisors is an integer number (994426680).

Almost surely, 2^20423133400 is an apocalyptic number.

20423133400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20423133400 is an abundant number, since it is smaller than the sum of its proper divisors (27309347240).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20423133400 is a wasteful number, since it uses less digits than its factorization.

20423133400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534844 (or 534835 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 22.

Adding to 20423133400 its reverse (433132402), we get a palindrome (20856265802).

The spelling of 20423133400 in words is "twenty billion, four hundred twenty-three million, one hundred thirty-three thousand, four hundred".