21114939 has 8 divisors (see below), whose sum is σ = 28342800. Its totient is φ = 13981856.

The previous prime is 21114931. The next prime is 21114941. The reversal of 21114939 is 93941112.

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 21114939 - 2³ = 21114931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21114931) 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, 23172 + ... + 24065.

It is an arithmetic number, because the mean of its divisors is an integer number (3542850).

Almost surely, 2^21114939 is an apocalyptic number.

21114939 is a deficient number, since it is larger than the sum of its proper divisors (7227861).

21114939 is a wasteful number, since it uses less digits than its factorization.

21114939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47389.

The product of its digits is 1944, while the sum is 30.

The square root of 21114939 is about 4595.0994548541. The cubic root of 21114939 is about 276.3948481108.

It can be divided in two parts, 21 and 114939, that added together give a triangular number (114960 = T₄₇₉).

The spelling of 21114939 in words is "twenty-one million, one hundred fourteen thousand, nine hundred thirty-nine".