20702385 has 48 divisors (see below), whose sum is σ = 40622400. Its totient is φ = 10031040.

The previous prime is 20702347. The next prime is 20702399. The reversal of 20702385 is 58320702.

It is not a de Polignac number, because 20702385 - 2⁷ = 20702257 is a prime.

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 47 ways as a sum of consecutive naturals, for example, 12591 + ... + 14139.

It is an arithmetic number, because the mean of its divisors is an integer number (846300).

Almost surely, 2^20702385 is an apocalyptic number.

It is an amenable number.

20702385 is a deficient number, since it is larger than the sum of its proper divisors (19920015).

20702385 is a wasteful number, since it uses less digits than its factorization.

20702385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1580 (or 1568 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 20702385 is about 4549.9873626198. The cubic root of 20702385 is about 274.5828827923.

The spelling of 20702385 in words is "twenty million, seven hundred two thousand, three hundred eighty-five".