21032413400 has 48 divisors (see below), whose sum is σ = 49114006800. Its totient is φ = 8376209280.

The previous prime is 21032413351. The next prime is 21032413427. The reversal of 21032413400 is 431423012.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 183812 + ... + 275411.

It is an arithmetic number, because the mean of its divisors is an integer number (1023208475).

Almost surely, 2^21032413400 is an apocalyptic number.

21032413400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21032413400 is an abundant number, since it is smaller than the sum of its proper divisors (28081593400).

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

21032413400 is a wasteful number, since it uses less digits than its factorization.

21032413400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 459468 (or 459459 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21032413400 its reverse (431423012), we get a palindrome (21463836412).

The spelling of 21032413400 in words is "twenty-one billion, thirty-two million, four hundred thirteen thousand, four hundred".