20551862 has 4 divisors (see below), whose sum is σ = 30827796. Its totient is φ = 10275930.

The previous prime is 20551847. The next prime is 20551871. The reversal of 20551862 is 26815502.

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

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, 5137964 + ... + 5137967.

It is an arithmetic number, because the mean of its divisors is an integer number (7706949).

Almost surely, 2^20551862 is an apocalyptic number.

20551862 is a deficient number, since it is larger than the sum of its proper divisors (10275934).

20551862 is a wasteful number, since it uses less digits than its factorization.

20551862 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10275933.

The product of its (nonzero) digits is 4800, while the sum is 29.

The square root of 20551862 is about 4533.4161512043. The cubic root of 20551862 is about 273.9157838754.

The spelling of 20551862 in words is "twenty million, five hundred fifty-one thousand, eight hundred sixty-two".