20283664 has 20 divisors (see below), whose sum is σ = 39372480. Its totient is φ = 10123040.

The previous prime is 20283617. The next prime is 20283667. The reversal of 20283664 is 46638202.

It is a super-2 number, since 2×20283664² = 822854050529792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20283667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12669 + ... + 14179.

It is an arithmetic number, because the mean of its divisors is an integer number (1968624).

Almost surely, 2^20283664 is an apocalyptic number.

It is an amenable number.

20283664 is a deficient number, since it is larger than the sum of its proper divisors (19088816).

20283664 is a wasteful number, since it uses less digits than its factorization.

20283664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2358 (or 2352 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The square root of 20283664 is about 4503.7388911881. The cubic root of 20283664 is about 272.7190461626.

The spelling of 20283664 in words is "twenty million, two hundred eighty-three thousand, six hundred sixty-four".