21701054 has 16 divisors (see below), whose sum is σ = 34425216. Its totient is φ = 10243200.

The previous prime is 21701051. The next prime is 21701083. The reversal of 21701054 is 45010712.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21701051) 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 in 7 ways as a sum of consecutive naturals, for example, 1727 + ... + 6810.

It is an arithmetic number, because the mean of its divisors is an integer number (2151576).

Almost surely, 2^21701054 is an apocalyptic number.

21701054 is a deficient number, since it is larger than the sum of its proper divisors (12724162).

21701054 is a wasteful number, since it uses less digits than its factorization.

21701054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8611.

The product of its (nonzero) digits is 280, while the sum is 20.

The square root of 21701054 is about 4658.4390089385. The cubic root of 21701054 is about 278.9289610720.

Adding to 21701054 its reverse (45010712), we get a palindrome (66711766).

The spelling of 21701054 in words is "twenty-one million, seven hundred one thousand, fifty-four".