20668462 has 4 divisors (see below), whose sum is σ = 31002696. Its totient is φ = 10334230.

The previous prime is 20668451. The next prime is 20668477. The reversal of 20668462 is 26486602.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5167114 + ... + 5167117.

It is an arithmetic number, because the mean of its divisors is an integer number (7750674).

Almost surely, 2^20668462 is an apocalyptic number.

20668462 is a deficient number, since it is larger than the sum of its proper divisors (10334234).

20668462 is a wasteful number, since it uses less digits than its factorization.

20668462 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10334233.

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 20668462 is about 4546.2580217141. The cubic root of 20668462 is about 274.4328233111.

The spelling of 20668462 in words is "twenty million, six hundred sixty-eight thousand, four hundred sixty-two".