20371628 has 12 divisors (see below), whose sum is σ = 35820792. Its totient is φ = 10137120.

The previous prime is 20371597. The next prime is 20371669. The reversal of 20371628 is 82617302.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 20371628.

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 3 ways as a sum of consecutive naturals, for example, 11225 + ... + 12912.

It is an arithmetic number, because the mean of its divisors is an integer number (2985066).

Almost surely, 2^20371628 is an apocalyptic number.

It is an amenable number.

20371628 is a deficient number, since it is larger than the sum of its proper divisors (15449164).

20371628 is a wasteful number, since it uses less digits than its factorization.

20371628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24352 (or 24350 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 20371628 is about 4513.4939902475. The cubic root of 20371628 is about 273.1127104630.

The spelling of 20371628 in words is "twenty million, three hundred seventy-one thousand, six hundred twenty-eight".