21775014 has 16 divisors (see below), whose sum is σ = 48389040. Its totient is φ = 7258320.

The previous prime is 21774983. The next prime is 21775031. The reversal of 21775014 is 41057712.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent 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, 201567 + ... + 201674.

It is an arithmetic number, because the mean of its divisors is an integer number (3024315).

Almost surely, 2^21775014 is an apocalyptic number.

21775014 is an abundant number, since it is smaller than the sum of its proper divisors (26614026).

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

21775014 is a wasteful number, since it uses less digits than its factorization.

21775014 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403252 (or 403246 counting only the distinct ones).

The product of its (nonzero) digits is 1960, while the sum is 27.

The square root of 21775014 is about 4666.3705382235. The cubic root of 21775014 is about 279.2454770983.

The spelling of 21775014 in words is "twenty-one million, seven hundred seventy-five thousand, fourteen".