20553502 has 4 divisors (see below), whose sum is σ = 30830256. Its totient is φ = 10276750.

The previous prime is 20553499. The next prime is 20553503. The reversal of 20553502 is 20535502.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20553503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5138374 + ... + 5138377.

It is an arithmetic number, because the mean of its divisors is an integer number (7707564).

Almost surely, 2^20553502 is an apocalyptic number.

20553502 is a deficient number, since it is larger than the sum of its proper divisors (10276754).

20553502 is a wasteful number, since it uses less digits than its factorization.

20553502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10276753.

The product of its (nonzero) digits is 1500, while the sum is 22.

The square root of 20553502 is about 4533.5970266445. The cubic root of 20553502 is about 273.9230696700.

The spelling of 20553502 in words is "twenty million, five hundred fifty-three thousand, five hundred two".