20914390916 has 24 divisors (see below), whose sum is σ = 36894836160. Its totient is φ = 10373137632.

The previous prime is 20914390907. The next prime is 20914390943. The reversal of 20914390916 is 61909341902.

It is a happy number.

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, 664610 + ... + 695366.

It is an arithmetic number, because the mean of its divisors is an integer number (1537284840).

Almost surely, 2^20914390916 is an apocalyptic number.

It is an amenable number.

20914390916 is a deficient number, since it is larger than the sum of its proper divisors (15980445244).

20914390916 is a wasteful number, since it uses less digits than its factorization.

20914390916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32123 (or 32121 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 44.

The spelling of 20914390916 in words is "twenty billion, nine hundred fourteen million, three hundred ninety thousand, nine hundred sixteen".