21026038748 has 24 divisors (see below), whose sum is σ = 43228360560. Its totient is φ = 8822113920.

The previous prime is 21026038741. The next prime is 21026038783. The reversal of 21026038748 is 84783062012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21026038741) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18378833 + ... + 18379976.

It is an arithmetic number, because the mean of its divisors is an integer number (1801181690).

Almost surely, 2^21026038748 is an apocalyptic number.

It is an amenable number.

21026038748 is an abundant number, since it is smaller than the sum of its proper divisors (22202321812).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21026038748 is a wasteful number, since it uses less digits than its factorization.

21026038748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36758837 (or 36758835 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 41.

The spelling of 21026038748 in words is "twenty-one billion, twenty-six million, thirty-eight thousand, seven hundred forty-eight".