21383249510 has 32 divisors (see below), whose sum is σ = 43997677632. Its totient is φ = 7329853440.

The previous prime is 21383249507. The next prime is 21383249513. The reversal of 21383249510 is 1594238312.

It is an interprime number because it is at equal distance from previous prime (21383249507) and next prime (21383249513).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21383249513) 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, 331070 + ... + 390350.

It is an arithmetic number, because the mean of its divisors is an integer number (1374927426).

Almost surely, 2^21383249510 is an apocalyptic number.

21383249510 is an abundant number, since it is smaller than the sum of its proper divisors (22614428122).

21383249510 is a wasteful number, since it uses less digits than its factorization.

21383249510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64448.

The product of its (nonzero) digits is 51840, while the sum is 38.

The spelling of 21383249510 in words is "twenty-one billion, three hundred eighty-three million, two hundred forty-nine thousand, five hundred ten".