20402052 has 36 divisors (see below), whose sum is σ = 52329648. Its totient is φ = 6182000.

The previous prime is 20402021. The next prime is 20402087. The reversal of 20402052 is 25020402.

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 11 ways as a sum of consecutive naturals, for example, 5574 + ... + 8477.

Almost surely, 2^20402052 is an apocalyptic number.

20402052 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

20402052 is an abundant number, since it is smaller than the sum of its proper divisors (31927596).

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

20402052 is a wasteful number, since it uses less digits than its factorization.

20402052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14080 (or 14067 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 15.

The square root of 20402052 is about 4516.8630707605. The cubic root of 20402052 is about 273.2486028600.

Adding to 20402052 its reverse (25020402), we get a palindrome (45422454).

The spelling of 20402052 in words is "twenty million, four hundred two thousand, fifty-two".