21352470461 has 16 divisors (see below), whose sum is σ = 24825847680. Its totient is φ = 17985085440.

The previous prime is 21352470421. The next prime is 21352470527. The reversal of 21352470461 is 16407425312.

It is not a de Polignac number, because 21352470461 - 2²⁶ = 21285361597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21352470421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1287341 + ... + 1303821.

It is an arithmetic number, because the mean of its divisors is an integer number (1551615480).

Almost surely, 2^21352470461 is an apocalyptic number.

It is an amenable number.

21352470461 is a deficient number, since it is larger than the sum of its proper divisors (3473377219).

21352470461 is a wasteful number, since it uses less digits than its factorization.

21352470461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19684.

The product of its (nonzero) digits is 40320, while the sum is 35.

Adding to 21352470461 its reverse (16407425312), we get a palindrome (37759895773).

The spelling of 21352470461 in words is "twenty-one billion, three hundred fifty-two million, four hundred seventy thousand, four hundred sixty-one".