3402366021 has 6 divisors (see below), whose sum is σ = 4914528710. Its totient is φ = 2268244008.

The previous prime is 3402366007. The next prime is 3402366041. The reversal of 3402366021 is 1206632043.

3402366021 is a `hidden beast` number, since 34 + 0 + 23 + 6 + 602 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1842984900 + 1559381121 = 42930^2 + 39489^2 .

It is not a de Polignac number, because 3402366021 - 2¹¹ = 3402363973 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3402366041) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 189020326 + ... + 189020343.

Almost surely, 2^3402366021 is an apocalyptic number.

It is an amenable number.

3402366021 is a deficient number, since it is larger than the sum of its proper divisors (1512162689).

3402366021 is a wasteful number, since it uses less digits than its factorization.

3402366021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 378040675 (or 378040672 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 3402366021 is about 58329.8038827493. The cubic root of 3402366021 is about 1504.0433166011.

Adding to 3402366021 its reverse (1206632043), we get a palindrome (4608998064).

The spelling of 3402366021 in words is "three billion, four hundred two million, three hundred sixty-six thousand, twenty-one".