21115351014 has 16 divisors (see below), whose sum is σ = 42238469952. Its totient is φ = 7037155688.

The previous prime is 21115351013. The next prime is 21115351021. The reversal of 21115351014 is 41015351112.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21115351013) 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, 288024 + ... + 353819.

It is an arithmetic number, because the mean of its divisors is an integer number (2639904372).

Almost surely, 2^21115351014 is an apocalyptic number.

21115351014 is an abundant number, since it is smaller than the sum of its proper divisors (21123118938).

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

21115351014 is a wasteful number, since it uses less digits than its factorization.

21115351014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 647331.

The product of its (nonzero) digits is 600, while the sum is 24.

The spelling of 21115351014 in words is "twenty-one billion, one hundred fifteen million, three hundred fifty-one thousand, fourteen".