21953977314 has 16 divisors (see below), whose sum is σ = 44170878528. Its totient is φ = 7274171792.

The previous prime is 21953977289. The next prime is 21953977321. The reversal of 21953977314 is 41377935912.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10954077 + ... + 10956080.

It is an arithmetic number, because the mean of its divisors is an integer number (2760679908).

Almost surely, 2^21953977314 is an apocalyptic number.

21953977314 is an abundant number, since it is smaller than the sum of its proper divisors (22216901214).

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

21953977314 is a wasteful number, since it uses less digits than its factorization.

21953977314 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21910329.

The product of its digits is 1428840, while the sum is 51.

The spelling of 21953977314 in words is "twenty-one billion, nine hundred fifty-three million, nine hundred seventy-seven thousand, three hundred fourteen".