21476153 has 8 divisors (see below), whose sum is σ = 22307400. Its totient is φ = 20651008.

The previous prime is 21476131. The next prime is 21476159. The reversal of 21476153 is 35167412.

It can be written as a sum of positive squares in 4 ways, for example, as 3268864 + 18207289 = 1808^2 + 4267^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21476153 - 2¹⁶ = 21410617 is a prime.

It is a super-2 number, since 2×21476153² = 922450295358818, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21476159) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6425 + ... + 9177.

It is an arithmetic number, because the mean of its divisors is an integer number (2788425).

Almost surely, 2^21476153 is an apocalyptic number.

It is an amenable number.

21476153 is a deficient number, since it is larger than the sum of its proper divisors (831247).

21476153 is a wasteful number, since it uses less digits than its factorization.

21476153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3051.

The product of its digits is 5040, while the sum is 29.

The square root of 21476153 is about 4634.2370461598. The cubic root of 21476153 is about 277.9620438838.

It can be divided in two parts, 214 and 76153, that added together give a palindrome (76367).

The spelling of 21476153 in words is "twenty-one million, four hundred seventy-six thousand, one hundred fifty-three".