20727690 has 32 divisors (see below), whose sum is σ = 49899456. Its totient is φ = 5510400.

The previous prime is 20727683. The next prime is 20727691. The reversal of 20727690 is 9672702.

It is a super-2 number, since 2×20727690² = 859274265472200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20727691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11169 + ... + 12891.

It is an arithmetic number, because the mean of its divisors is an integer number (1559358).

Almost surely, 2^20727690 is an apocalyptic number.

20727690 is an abundant number, since it is smaller than the sum of its proper divisors (29171766).

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

20727690 is a wasteful number, since it uses less digits than its factorization.

20727690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2134.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 20727690 is about 4552.7672903411. The cubic root of 20727690 is about 274.6947135586.

The spelling of 20727690 in words is "twenty million, seven hundred twenty-seven thousand, six hundred ninety".