21124744910 has 32 divisors (see below), whose sum is σ = 39790336320. Its totient is φ = 8059583488.

The previous prime is 21124744897. The next prime is 21124744919. The reversal of 21124744910 is 1944742112.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21124744919) 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, 48905 + ... + 211284.

It is an arithmetic number, because the mean of its divisors is an integer number (1243448010).

Almost surely, 2^21124744910 is an apocalyptic number.

21124744910 is a deficient number, since it is larger than the sum of its proper divisors (18665591410).

21124744910 is a wasteful number, since it uses less digits than its factorization.

21124744910 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260572.

The product of its (nonzero) digits is 16128, while the sum is 35.

The spelling of 21124744910 in words is "twenty-one billion, one hundred twenty-four million, seven hundred forty-four thousand, nine hundred ten".