20870814 has 8 divisors (see below), whose sum is σ = 41741640. Its totient is φ = 6956936.

The previous prime is 20870813. The next prime is 20870869. The reversal of 20870814 is 41807802.

It is a sphenic number, since it is the product of 3 distinct primes.

20870814 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20870813) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1739229 + ... + 1739240.

It is an arithmetic number, because the mean of its divisors is an integer number (5217705).

Almost surely, 2^20870814 is an apocalyptic number.

20870814 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20870814 is a wasteful number, since it uses less digits than its factorization.

20870814 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3478474.

The product of its (nonzero) digits is 3584, while the sum is 30.

The square root of 20870814 is about 4568.4586021983. The cubic root of 20870814 is about 275.3255164637.

The spelling of 20870814 in words is "twenty million, eight hundred seventy thousand, eight hundred fourteen".