20986416 has 60 divisors (see below), whose sum is σ = 64077000. Its totient is φ = 6359040.

The previous prime is 20986409. The next prime is 20986423. The reversal of 20986416 is 61468902.

20986416 is a `hidden beast` number, since 2 + 0 + 9 + 8 + 641 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (20986409) and next prime (20986423).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5041 + ... + 8208.

It is an arithmetic number, because the mean of its divisors is an integer number (1067950).

Almost surely, 2^20986416 is an apocalyptic number.

It is an amenable number.

20986416 is an abundant number, since it is smaller than the sum of its proper divisors (43090584).

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

20986416 is a wasteful number, since it uses less digits than its factorization.

20986416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13274 (or 13265 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 20986416 is about 4581.0933192853. The cubic root of 20986416 is about 275.8329171465.

The spelling of 20986416 in words is "twenty million, nine hundred eighty-six thousand, four hundred sixteen".