20993054 has 4 divisors (see below), whose sum is σ = 31489584. Its totient is φ = 10496526.

The previous prime is 20993047. The next prime is 20993059. The reversal of 20993054 is 45039902.

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

It is a self number, because there is not a number n which added to its sum of digits gives 20993054.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20993059) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5248262 + ... + 5248265.

It is an arithmetic number, because the mean of its divisors is an integer number (7872396).

Almost surely, 2^20993054 is an apocalyptic number.

20993054 is a deficient number, since it is larger than the sum of its proper divisors (10496530).

20993054 is a wasteful number, since it uses less digits than its factorization.

20993054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10496529.

The product of its (nonzero) digits is 9720, while the sum is 32.

The square root of 20993054 is about 4581.8177615440. The cubic root of 20993054 is about 275.8619960499.

The spelling of 20993054 in words is "twenty million, nine hundred ninety-three thousand, fifty-four".