21701044046 has 16 divisors (see below), whose sum is σ = 35938643328. Its totient is φ = 9745265400.

The previous prime is 21701044007. The next prime is 21701044061. The reversal of 21701044046 is 64044010712.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5940410 + ... + 5944061.

It is an arithmetic number, because the mean of its divisors is an integer number (2246165208).

Almost surely, 2^21701044046 is an apocalyptic number.

21701044046 is a deficient number, since it is larger than the sum of its proper divisors (14237599282).

21701044046 is a wasteful number, since it uses less digits than its factorization.

21701044046 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11884567.

The product of its (nonzero) digits is 5376, while the sum is 29.

Adding to 21701044046 its reverse (64044010712), we get a palindrome (85745054758).

The spelling of 21701044046 in words is "twenty-one billion, seven hundred one million, forty-four thousand, forty-six".