20402452 has 12 divisors (see below), whose sum is σ = 40804960. Its totient is φ = 8743896.

The previous prime is 20402443. The next prime is 20402467. The reversal of 20402452 is 25420402.

20402452 is an admirable number.

It is a super-2 number, since 2×20402452² = 832520095224608, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 364302 + ... + 364357.

Almost surely, 2^20402452 is an apocalyptic number.

It is an amenable number.

20402452 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

20402452 is a wasteful number, since it uses less digits than its factorization.

20402452 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 728670 (or 728668 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 19.

The square root of 20402452 is about 4516.9073490609. The cubic root of 20402452 is about 273.2503886073.

Adding to 20402452 its reverse (25420402), we get a palindrome (45822854).

The spelling of 20402452 in words is "twenty million, four hundred two thousand, four hundred fifty-two".