21010827446 has 32 divisors (see below), whose sum is σ = 37118172672. Its totient is φ = 8732370240.

The previous prime is 21010827433. The next prime is 21010827449. The reversal of 21010827446 is 64472801012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21010827449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13736 + ... + 205451.

It is an arithmetic number, because the mean of its divisors is an integer number (1159942896).

Almost surely, 2^21010827446 is an apocalyptic number.

21010827446 is a deficient number, since it is larger than the sum of its proper divisors (16107345226).

21010827446 is a wasteful number, since it uses less digits than its factorization.

21010827446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219404.

The product of its (nonzero) digits is 21504, while the sum is 35.

The spelling of 21010827446 in words is "twenty-one billion, ten million, eight hundred twenty-seven thousand, four hundred forty-six".