21194701 has 4 divisors (see below), whose sum is σ = 23121504. Its totient is φ = 19267900.

The previous prime is 21194689. The next prime is 21194773. The reversal of 21194701 is 10749112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21194701 - 2⁷ = 21194573 is a prime.

It is a super-3 number, since 3×21194701³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21194501) 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, 963385 + ... + 963406.

It is an arithmetic number, because the mean of its divisors is an integer number (5780376).

Almost surely, 2^21194701 is an apocalyptic number.

It is an amenable number.

21194701 is a deficient number, since it is larger than the sum of its proper divisors (1926803).

21194701 is a wasteful number, since it uses less digits than its factorization.

21194701 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1926802.

The product of its (nonzero) digits is 504, while the sum is 25.

The square root of 21194701 is about 4603.7703026976. The cubic root of 21194701 is about 276.7424393673.

The spelling of 21194701 in words is "twenty-one million, one hundred ninety-four thousand, seven hundred one".