21454005235 has 16 divisors (see below), whose sum is σ = 28619539200. Its totient is φ = 15331893120.

The previous prime is 21454005233. The next prime is 21454005263. The reversal of 21454005235 is 53250045412.

It is not a de Polignac number, because 21454005235 - 2¹ = 21454005233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (31).

It is a junction number, because it is equal to n+sod(n) for n = 21454005197 and 21454005206.

It is not an unprimeable number, because it can be changed into a prime (21454005233) 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, 5321560 + ... + 5325589.

It is an arithmetic number, because the mean of its divisors is an integer number (1788721200).

Almost surely, 2^21454005235 is an apocalyptic number.

21454005235 is a deficient number, since it is larger than the sum of its proper divisors (7165533965).

21454005235 is a wasteful number, since it uses less digits than its factorization.

21454005235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10647198.

The product of its (nonzero) digits is 24000, while the sum is 31.

The spelling of 21454005235 in words is "twenty-one billion, four hundred fifty-four million, five thousand, two hundred thirty-five".