20513054 has 4 divisors (see below), whose sum is σ = 30769584. Its totient is φ = 10256526.

The previous prime is 20513039. The next prime is 20513057. The reversal of 20513054 is 45031502.

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 (20513057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5128262 + ... + 5128265.

It is an arithmetic number, because the mean of its divisors is an integer number (7692396).

Almost surely, 2^20513054 is an apocalyptic number.

20513054 is a deficient number, since it is larger than the sum of its proper divisors (10256530).

20513054 is a wasteful number, since it uses less digits than its factorization.

20513054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10256529.

The product of its (nonzero) digits is 600, while the sum is 20.

The square root of 20513054 is about 4529.1339127917. The cubic root of 20513054 is about 273.7432638752.

Adding to 20513054 its reverse (45031502), we get a palindrome (65544556).

The spelling of 20513054 in words is "twenty million, five hundred thirteen thousand, fifty-four".