21044023370 has 32 divisors (see below), whose sum is σ = 38279195136. Its totient is φ = 8329129600.

The previous prime is 21044023369. The next prime is 21044023381. The reversal of 21044023370 is 7332044012.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401375 + ... + 450765.

It is an arithmetic number, because the mean of its divisors is an integer number (1196224848).

Almost surely, 2^21044023370 is an apocalyptic number.

21044023370 is a deficient number, since it is larger than the sum of its proper divisors (17235171766).

21044023370 is a wasteful number, since it uses less digits than its factorization.

21044023370 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49846.

The product of its (nonzero) digits is 4032, while the sum is 26.

Adding to 21044023370 its reverse (7332044012), we get a palindrome (28376067382).

The spelling of 21044023370 in words is "twenty-one billion, forty-four million, twenty-three thousand, three hundred seventy".