21016294 has 16 divisors (see below), whose sum is σ = 34025040. Its totient is φ = 9678240.

The previous prime is 21016279. The next prime is 21016297. The reversal of 21016294 is 49261012.

It is a super-2 number, since 2×21016294² = 883369226988872, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21016297) 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, 21864 + ... + 22804.

It is an arithmetic number, because the mean of its divisors is an integer number (2126565).

Almost surely, 2^21016294 is an apocalyptic number.

21016294 is a deficient number, since it is larger than the sum of its proper divisors (13008746).

21016294 is a wasteful number, since it uses less digits than its factorization.

21016294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1815.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 21016294 is about 4584.3531713863. The cubic root of 21016294 is about 275.9637546046.

The spelling of 21016294 in words is "twenty-one million, sixteen thousand, two hundred ninety-four".