21310352454 has 32 divisors (see below), whose sum is σ = 44311913856. Its totient is φ = 6826754880.

The previous prime is 21310352417. The next prime is 21310352461. The reversal of 21310352454 is 45425301312.

It is a super-2 number, since 2×21310352454² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 629992 + ... + 662955.

It is an arithmetic number, because the mean of its divisors is an integer number (1384747308).

Almost surely, 2^21310352454 is an apocalyptic number.

21310352454 is an abundant number, since it is smaller than the sum of its proper divisors (23001561402).

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

21310352454 is a wasteful number, since it uses less digits than its factorization.

21310352454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1293060.

The product of its (nonzero) digits is 14400, while the sum is 30.

Adding to 21310352454 its reverse (45425301312), we get a palindrome (66735653766).

The spelling of 21310352454 in words is "twenty-one billion, three hundred ten million, three hundred fifty-two thousand, four hundred fifty-four".