20642486 has 8 divisors (see below), whose sum is σ = 31003824. Its totient is φ = 10307880.

The previous prime is 20642467. The next prime is 20642509. The reversal of 20642486 is 68424602.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×20642486² = 852224456520392, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4625 + ... + 7916.

It is an arithmetic number, because the mean of its divisors is an integer number (3875478).

Almost surely, 2^20642486 is an apocalyptic number.

20642486 is a deficient number, since it is larger than the sum of its proper divisors (10361338).

20642486 is a wasteful number, since it uses less digits than its factorization.

20642486 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13366.

The product of its (nonzero) digits is 18432, while the sum is 32.

The square root of 20642486 is about 4543.4002685214. The cubic root of 20642486 is about 274.3178066006.

The spelling of 20642486 in words is "twenty million, six hundred forty-two thousand, four hundred eighty-six".