21477600446 has 4 divisors (see below), whose sum is σ = 32216400672. Its totient is φ = 10738800222.

The previous prime is 21477600439. The next prime is 21477600457. The reversal of 21477600446 is 64400677412.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21477600446² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5369400110 + ... + 5369400113.

It is an arithmetic number, because the mean of its divisors is an integer number (8054100168).

Almost surely, 2^21477600446 is an apocalyptic number.

21477600446 is a deficient number, since it is larger than the sum of its proper divisors (10738800226).

21477600446 is a wasteful number, since it uses less digits than its factorization.

21477600446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10738800225.

The product of its (nonzero) digits is 225792, while the sum is 41.

The spelling of 21477600446 in words is "twenty-one billion, four hundred seventy-seven million, six hundred thousand, four hundred forty-six".