21455450203100 has 36 divisors (see below), whose sum is σ = 46590817361424. Its totient is φ = 8576191063680.

The previous prime is 21455450203097. The next prime is 21455450203111. The reversal of 21455450203100 is 130205455412.

It is a super-2 number, since 2×21455450203100² (a number of 27 digits) contains 22 as substring.

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, 74718704 + ... + 75005303.

Almost surely, 2^{21455450203100} is an apocalyptic number.

21455450203100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21455450203100 is an abundant number, since it is smaller than the sum of its proper divisors (25135367158324).

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

21455450203100 is a wasteful number, since it uses less digits than its factorization.

21455450203100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149725454 (or 149725447 counting only the distinct ones).

The product of its (nonzero) digits is 24000, while the sum is 32.

Adding to 21455450203100 its reverse (130205455412), we get a palindrome (21585655658512).

The spelling of 21455450203100 in words is "twenty-one trillion, four hundred fifty-five billion, four hundred fifty million, two hundred three thousand, one hundred".