21474995 has 16 divisors (see below), whose sum is σ = 27394848. Its totient is φ = 16104960.

The previous prime is 21474991. The next prime is 21475001. The reversal of 21474995 is 59947412.

It is not a de Polignac number, because 21474995 - 2² = 21474991 is a prime.

It is a super-2 number, since 2×21474995² = 922350820500050, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21474991) 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, 39425 + ... + 39965.

It is an arithmetic number, because the mean of its divisors is an integer number (1712178).

Almost surely, 2^21474995 is an apocalyptic number.

21474995 is a deficient number, since it is larger than the sum of its proper divisors (5919853).

21474995 is a wasteful number, since it uses less digits than its factorization.

21474995 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1030.

The product of its digits is 90720, while the sum is 41.

The square root of 21474995 is about 4634.1121048158. The cubic root of 21474995 is about 277.9570478643.

The spelling of 21474995 in words is "twenty-one million, four hundred seventy-four thousand, nine hundred ninety-five".