20366613 has 48 divisors (see below), whose sum is σ = 33768000. Its totient is φ = 12083904.

The previous prime is 20366611. The next prime is 20366639. The reversal of 20366613 is 31666302.

It is not a de Polignac number, because 20366613 - 2¹ = 20366611 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20366611) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 550431 + ... + 550467.

It is an arithmetic number, because the mean of its divisors is an integer number (703500).

Almost surely, 2^20366613 is an apocalyptic number.

It is an amenable number.

20366613 is a deficient number, since it is larger than the sum of its proper divisors (13401387).

20366613 is a wasteful number, since it uses less digits than its factorization.

20366613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131 (or 88 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

The square root of 20366613 is about 4512.9383997569. The cubic root of 20366613 is about 273.0902973851.

It can be divided in two parts, 2036 and 6613, that added together give a square (8649 = 93²).

The spelling of 20366613 in words is "twenty million, three hundred sixty-six thousand, six hundred thirteen".