21477032 has 32 divisors (see below), whose sum is σ = 42353280. Its totient is φ = 10190400.

The previous prime is 21477007. The next prime is 21477037. The reversal of 21477032 is 23077412.

It is a super-2 number, since 2×21477032² = 922525807058048, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21476992 and 21477010.

It is not an unprimeable number, because it can be changed into a prime (21477037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27398 + ... + 28170.

It is an arithmetic number, because the mean of its divisors is an integer number (1323540).

Almost surely, 2^21477032 is an apocalyptic number.

It is an amenable number.

21477032 is a deficient number, since it is larger than the sum of its proper divisors (20876248).

21477032 is a wasteful number, since it uses less digits than its factorization.

21477032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 953 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 21477032 is about 4634.3318828068. The cubic root of 21477032 is about 277.9658360791.

The spelling of 21477032 in words is "twenty-one million, four hundred seventy-seven thousand, thirty-two".