21940127 has 8 divisors (see below), whose sum is σ = 23991552. Its totient is φ = 19898200.

The previous prime is 21940111. The next prime is 21940151. The reversal of 21940127 is 72104912.

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

It is a cyclic number.

It is not a de Polignac number, because 21940127 - 2⁴ = 21940111 is a prime.

It is a super-2 number, since 2×21940127² = 962738345552258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21940096 and 21940105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21940187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3002 + ... + 7272.

It is an arithmetic number, because the mean of its divisors is an integer number (2998944).

Almost surely, 2^21940127 is an apocalyptic number.

21940127 is a deficient number, since it is larger than the sum of its proper divisors (2051425).

21940127 is a wasteful number, since it uses less digits than its factorization.

21940127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4749.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 21940127 is about 4684.0289281771. The cubic root of 21940127 is about 279.9495104541.

The spelling of 21940127 in words is "twenty-one million, nine hundred forty thousand, one hundred twenty-seven".