21350954 has 4 divisors (see below), whose sum is σ = 32026434. Its totient is φ = 10675476.

The previous prime is 21350933. The next prime is 21350999. The reversal of 21350954 is 45905312.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 13359025 + 7991929 = 3655^2 + 2827^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5337737 + ... + 5337740.

Almost surely, 2^21350954 is an apocalyptic number.

21350954 is a deficient number, since it is larger than the sum of its proper divisors (10675480).

21350954 is a wasteful number, since it uses less digits than its factorization.

21350954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10675479.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 21350954 is about 4620.7092529178. The cubic root of 21350954 is about 277.4208480258.

The spelling of 21350954 in words is "twenty-one million, three hundred fifty thousand, nine hundred fifty-four".