20662620 has 48 divisors (see below), whose sum is σ = 63116928. Its totient is φ = 5008960.

The previous prime is 20662619. The next prime is 20662637. The reversal of 20662620 is 2626602.

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 in 15 ways as a sum of consecutive naturals, for example, 14994 + ... + 16313.

It is an arithmetic number, because the mean of its divisors is an integer number (1314936).

Almost surely, 2^20662620 is an apocalyptic number.

20662620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20662620 is an abundant number, since it is smaller than the sum of its proper divisors (42454308).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20662620 is a wasteful number, since it uses less digits than its factorization.

20662620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31330 (or 31328 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 20662620 is about 4545.6154698786. The cubic root of 20662620 is about 274.4069644667.

It can be divided in two parts, 206 and 62620, that added together give a palindrome (62826).

The spelling of 20662620 in words is "twenty million, six hundred sixty-two thousand, six hundred twenty".