20870846 has 16 divisors (see below), whose sum is σ = 31966224. Its totient is φ = 10217664.

The previous prime is 20870813. The next prime is 20870869. The reversal of 20870846 is 64807802.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23360 + ... + 24236.

It is an arithmetic number, because the mean of its divisors is an integer number (1997889).

Almost surely, 2^20870846 is an apocalyptic number.

20870846 is a deficient number, since it is larger than the sum of its proper divisors (11095378).

20870846 is a wasteful number, since it uses less digits than its factorization.

20870846 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115.

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 20870846 is about 4568.4621044724. The cubic root of 20870846 is about 275.3256571772.

The spelling of 20870846 in words is "twenty million, eight hundred seventy thousand, eight hundred forty-six".