20828010 has 32 divisors (see below), whose sum is σ = 57128832. Its totient is φ = 4760640.

The previous prime is 20827999. The next prime is 20828029. The reversal of 20828010 is 1082802.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49381 + ... + 49800.

It is an arithmetic number, because the mean of its divisors is an integer number (1785276).

Almost surely, 2^20828010 is an apocalyptic number.

20828010 is an abundant number, since it is smaller than the sum of its proper divisors (36300822).

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

20828010 is a wasteful number, since it uses less digits than its factorization.

20828010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99198.

The product of its (nonzero) digits is 256, while the sum is 21.

The square root of 20828010 is about 4563.7714666710. The cubic root of 20828010 is about 275.1371657323.

The spelling of 20828010 in words is "twenty million, eight hundred twenty-eight thousand, ten".