20726650 has 24 divisors (see below), whose sum is σ = 44059680. Its totient is φ = 7106160.

The previous prime is 20726647. The next prime is 20726653. The reversal of 20726650 is 5662702.

It is an interprime number because it is at equal distance from previous prime (20726647) and next prime (20726653).

It is not an unprimeable number, because it can be changed into a prime (20726653) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 29260 + ... + 29959.

It is an arithmetic number, because the mean of its divisors is an integer number (1835820).

Almost surely, 2^20726650 is an apocalyptic number.

20726650 is an abundant number, since it is smaller than the sum of its proper divisors (23333030).

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

20726650 is a wasteful number, since it uses less digits than its factorization.

20726650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59238 (or 59233 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20726650 is about 4552.6530726599. The cubic root of 20726650 is about 274.6901192650.

The spelling of 20726650 in words is "twenty million, seven hundred twenty-six thousand, six hundred fifty".