20804370 has 32 divisors (see below), whose sum is σ = 50077440. Its totient is φ = 5531520.

The previous prime is 20804369. The next prime is 20804387. The reversal of 20804370 is 7340802.

It is a super-2 number, since 2×20804370² = 865643622193800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20804370.

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, 12126 + ... + 13734.

It is an arithmetic number, because the mean of its divisors is an integer number (1564920).

Almost surely, 2^20804370 is an apocalyptic number.

20804370 is an abundant number, since it is smaller than the sum of its proper divisors (29273070).

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

20804370 is a wasteful number, since it uses less digits than its factorization.

20804370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2050.

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 20804370 is about 4561.1807681783. The cubic root of 20804370 is about 275.0330318449.

The spelling of 20804370 in words is "twenty million, eight hundred four thousand, three hundred seventy".