20517054 has 8 divisors (see below), whose sum is σ = 41034120. Its totient is φ = 6839016.

The previous prime is 20517047. The next prime is 20517059. The reversal of 20517054 is 45071502.

It is a sphenic number, since it is the product of 3 distinct primes.

20517054 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20517059) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1709749 + ... + 1709760.

It is an arithmetic number, because the mean of its divisors is an integer number (5129265).

Almost surely, 2^20517054 is an apocalyptic number.

20517054 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20517054 is a wasteful number, since it uses less digits than its factorization.

20517054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3419514.

The product of its (nonzero) digits is 1400, while the sum is 24.

The square root of 20517054 is about 4529.5754767969. The cubic root of 20517054 is about 273.7610558284.

Adding to 20517054 its reverse (45071502), we get a palindrome (65588556).

The spelling of 20517054 in words is "twenty million, five hundred seventeen thousand, fifty-four".