21477006 has 24 divisors (see below), whose sum is σ = 46949760. Its totient is φ = 7094976.

The previous prime is 21476993. The next prime is 21477007. The reversal of 21477006 is 60077412.

It is a super-2 number, since 2×21477006² = 922523573448072, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21477007) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3246 + ... + 7313.

It is an arithmetic number, because the mean of its divisors is an integer number (1956240).

Almost surely, 2^21477006 is an apocalyptic number.

21477006 is an abundant number, since it is smaller than the sum of its proper divisors (25472754).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21477006 is a wasteful number, since it uses less digits than its factorization.

21477006 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10680 (or 10677 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 27.

The square root of 21477006 is about 4634.3290776551. The cubic root of 21477006 is about 277.9657239110.

The spelling of 21477006 in words is "twenty-one million, four hundred seventy-seven thousand, six".