20727870 has 16 divisors (see below), whose sum is σ = 49746960. Its totient is φ = 5527424.

The previous prime is 20727851. The next prime is 20727877. The reversal of 20727870 is 7872702.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20727877) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 345435 + ... + 345494.

It is an arithmetic number, because the mean of its divisors is an integer number (3109185).

Almost surely, 2^20727870 is an apocalyptic number.

20727870 is an abundant number, since it is smaller than the sum of its proper divisors (29019090).

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

20727870 is a wasteful number, since it uses less digits than its factorization.

20727870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690939.

The product of its (nonzero) digits is 10976, while the sum is 33.

The square root of 20727870 is about 4552.7870584950. The cubic root of 20727870 is about 274.6955087092.

The spelling of 20727870 in words is "twenty million, seven hundred twenty-seven thousand, eight hundred seventy".