20631662 has 4 divisors (see below), whose sum is σ = 30947496. Its totient is φ = 10315830.

The previous prime is 20631649. The next prime is 20631671. The reversal of 20631662 is 26613602.

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 pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5157914 + ... + 5157917.

It is an arithmetic number, because the mean of its divisors is an integer number (7736874).

Almost surely, 2^20631662 is an apocalyptic number.

20631662 is a deficient number, since it is larger than the sum of its proper divisors (10315834).

20631662 is a wasteful number, since it uses less digits than its factorization.

20631662 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10315833.

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 20631662 is about 4542.2089339880. The cubic root of 20631662 is about 274.2698515390.

The spelling of 20631662 in words is "twenty million, six hundred thirty-one thousand, six hundred sixty-two".