36406021 has 2 divisors, whose sum is σ = 36406022. Its totient is φ = 36406020.

The previous prime is 36405973. The next prime is 36406037. The reversal of 36406021 is 12060463.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24750625 + 11655396 = 4975^2 + 3414^2 .

It is a cyclic number.

It is not a de Polignac number, because 36406021 - 2⁷ = 36405893 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 36405983 and 36406001.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (36406421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18203010 + 18203011.

It is an arithmetic number, because the mean of its divisors is an integer number (18203011).

Almost surely, 2^36406021 is an apocalyptic number.

It is an amenable number.

36406021 is a deficient number, since it is larger than the sum of its proper divisors (1).

36406021 is an equidigital number, since it uses as much as digits as its factorization.

36406021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 36406021 is about 6033.7402164826. The cubic root of 36406021 is about 331.4294313985.

Adding to 36406021 its reverse (12060463), we get a palindrome (48466484).

The spelling of 36406021 in words is "thirty-six million, four hundred six thousand, twenty-one".