21334052400 has 60 divisors (see below), whose sum is σ = 68340085032. Its totient is φ = 5689080320.

The previous prime is 21334052371. The next prime is 21334052401. The reversal of 21334052400 is 425043312.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (21334052401) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8887989 + ... + 8890388.

Almost surely, 2^21334052400 is an apocalyptic number.

21334052400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21334052400 is an abundant number, since it is smaller than the sum of its proper divisors (47006032632).

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

21334052400 is a wasteful number, since it uses less digits than its factorization.

21334052400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17778398 (or 17778387 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

Adding to 21334052400 its reverse (425043312), we get a palindrome (21759095712).

The spelling of 21334052400 in words is "twenty-one billion, three hundred thirty-four million, fifty-two thousand, four hundred".