21503223253410 has 64 divisors (see below), whose sum is σ = 52169531369472. Its totient is φ = 5672107648256.

The previous prime is 21503223253409. The next prime is 21503223253423. The reversal of 21503223253410 is 1435232230512.

It is a super-2 number, since 2×21503223253410² (a number of 27 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9493314 + ... + 11538173.

It is an arithmetic number, because the mean of its divisors is an integer number (815148927648).

Almost surely, 2^{21503223253410} is an apocalyptic number.

21503223253410 is an abundant number, since it is smaller than the sum of its proper divisors (30666308116062).

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

21503223253410 is a wasteful number, since it uses less digits than its factorization.

21503223253410 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21031867.

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 21503223253410 its reverse (1435232230512), we get a palindrome (22938455483922).

The spelling of 21503223253410 in words is "twenty-one trillion, five hundred three billion, two hundred twenty-three million, two hundred fifty-three thousand, four hundred ten".