20402552 has 8 divisors (see below), whose sum is σ = 38254800. Its totient is φ = 10201272.

The previous prime is 20402537. The next prime is 20402563. The reversal of 20402552 is 25520402.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×20402552² = 832528256225408, 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 (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1275152 + ... + 1275167.

It is an arithmetic number, because the mean of its divisors is an integer number (4781850).

Almost surely, 2^20402552 is an apocalyptic number.

It is an amenable number.

20402552 is a deficient number, since it is larger than the sum of its proper divisors (17852248).

20402552 is a wasteful number, since it uses less digits than its factorization.

20402552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2550325 (or 2550321 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 20.

The square root of 20402552 is about 4516.9184185681. The cubic root of 20402552 is about 273.2508350405.

Adding to 20402552 its reverse (25520402), we get a palindrome (45922954).

The spelling of 20402552 in words is "twenty million, four hundred two thousand, five hundred fifty-two".