20361906 has 12 divisors (see below), whose sum is σ = 44117502. Its totient is φ = 6787296.

The previous prime is 20361889. The next prime is 20361917. The reversal of 20361906 is 60916302.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16524225 + 3837681 = 4065^2 + 1959^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20361906.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 565591 + ... + 565626.

Almost surely, 2^20361906 is an apocalyptic number.

20361906 is an abundant number, since it is smaller than the sum of its proper divisors (23755596).

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

20361906 is a wasteful number, since it uses less digits than its factorization.

20361906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1131225 (or 1131222 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 20361906 is about 4512.4168690404. The cubic root of 20361906 is about 273.0692574759.

The spelling of 20361906 in words is "twenty million, three hundred sixty-one thousand, nine hundred six".