20551054 has 4 divisors (see below), whose sum is σ = 30826584. Its totient is φ = 10275526.

The previous prime is 20551051. The next prime is 20551061. The reversal of 20551054 is 45015502.

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 (20551051) by changing a digit.

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, 5137762 + ... + 5137765.

It is an arithmetic number, because the mean of its divisors is an integer number (7706646).

Almost surely, 2^20551054 is an apocalyptic number.

20551054 is a deficient number, since it is larger than the sum of its proper divisors (10275530).

20551054 is a wasteful number, since it uses less digits than its factorization.

20551054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10275529.

The product of its (nonzero) digits is 1000, while the sum is 22.

The square root of 20551054 is about 4533.3270343093. The cubic root of 20551054 is about 273.9121941462.

Adding to 20551054 its reverse (45015502), we get a palindrome (65566556).

The spelling of 20551054 in words is "twenty million, five hundred fifty-one thousand, fifty-four".