21203294 has 16 divisors (see below), whose sum is σ = 37331808. Its totient is φ = 8841312.

The previous prime is 21203293. The next prime is 21203317. The reversal of 21203294 is 49230212.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21203291) 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, 19949 + ... + 20984.

It is an arithmetic number, because the mean of its divisors is an integer number (2333238).

Almost surely, 2^21203294 is an apocalyptic number.

21203294 is a deficient number, since it is larger than the sum of its proper divisors (16128514).

21203294 is a wasteful number, since it uses less digits than its factorization.

21203294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40979.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 21203294 is about 4604.7034649367. The cubic root of 21203294 is about 276.7798343507.

The spelling of 21203294 in words is "twenty-one million, two hundred three thousand, two hundred ninety-four".