21474454699 has 4 divisors (see below), whose sum is σ = 21475959664. Its totient is φ = 21472949736.

The previous prime is 21474454691. The next prime is 21474454709. The reversal of 21474454699 is 99645447412.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 21474454699 - 2³ = 21474454691 is a prime.

It is a super-2 number, since 2×21474454699² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21474454691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 730872 + ... + 759685.

It is an arithmetic number, because the mean of its divisors is an integer number (5368989916).

Almost surely, 2^21474454699 is an apocalyptic number.

21474454699 is a deficient number, since it is larger than the sum of its proper divisors (1504965).

21474454699 is a wasteful number, since it uses less digits than its factorization.

21474454699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1504964.

The product of its digits is 8709120, while the sum is 55.

The spelling of 21474454699 in words is "twenty-one billion, four hundred seventy-four million, four hundred fifty-four thousand, six hundred ninety-nine".