21476697 has 32 divisors (see below), whose sum is σ = 32569344. Its totient is φ = 12475200.

The previous prime is 21476671. The next prime is 21476699. The reversal of 21476697 is 79667412.

It is not a de Polignac number, because 21476697 - 2¹⁶ = 21411161 is a prime.

It is a super-2 number, since 2×21476697² = 922497028059618, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21476699) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 94498 + ... + 94724.

It is an arithmetic number, because the mean of its divisors is an integer number (1017792).

Almost surely, 2^21476697 is an apocalyptic number.

It is an amenable number.

21476697 is a deficient number, since it is larger than the sum of its proper divisors (11092647).

21476697 is a wasteful number, since it uses less digits than its factorization.

21476697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349.

The product of its digits is 127008, while the sum is 42.

The square root of 21476697 is about 4634.2957393762. The cubic root of 21476697 is about 277.9643908292.

The spelling of 21476697 in words is "twenty-one million, four hundred seventy-six thousand, six hundred ninety-seven".