20945828 has 24 divisors (see below), whose sum is σ = 38808000. Its totient is φ = 9864288.

The previous prime is 20945807. The next prime is 20945833. The reversal of 20945828 is 82854902.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 20945791 and 20945800.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14273 + ... + 15671.

It is an arithmetic number, because the mean of its divisors is an integer number (1617000).

Almost surely, 2^20945828 is an apocalyptic number.

It is an amenable number.

20945828 is a deficient number, since it is larger than the sum of its proper divisors (17862172).

20945828 is a wasteful number, since it uses less digits than its factorization.

20945828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1619 (or 1617 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 38.

The square root of 20945828 is about 4576.6612284503. The cubic root of 20945828 is about 275.6549809103.

The spelling of 20945828 in words is "twenty million, nine hundred forty-five thousand, eight hundred twenty-eight".