21194914 has 32 divisors (see below), whose sum is σ = 36328320. Its totient is φ = 9217296.

The previous prime is 21194879. The next prime is 21194933. The reversal of 21194914 is 41949112.

21194914 = T₂₁₇ + T₂₁₈ + ... + T₅₁₅.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 316309 + ... + 316375.

It is an arithmetic number, because the mean of its divisors is an integer number (1135260).

Almost surely, 2^21194914 is an apocalyptic number.

21194914 is a deficient number, since it is larger than the sum of its proper divisors (15133406).

21194914 is an equidigital number, since it uses as much as digits as its factorization.

21194914 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151 (or 105 counting only the distinct ones).

The product of its digits is 2592, while the sum is 31.

The square root of 21194914 is about 4603.7934358527. The cubic root of 21194914 is about 276.7433664220.

It can be divided in two parts, 2119 and 4914, that multiplied together give a triangular number (10412766 = T₄₅₆₃).

The spelling of 21194914 in words is "twenty-one million, one hundred ninety-four thousand, nine hundred fourteen".