21034158 has 16 divisors (see below), whose sum is σ = 42377040. Its totient is φ = 6959936.

The previous prime is 21034133. The next prime is 21034183. The reversal of 21034158 is 85143012.

It is an interprime number because it is at equal distance from previous prime (21034133) and next prime (21034183).

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11973 + ... + 13616.

It is an arithmetic number, because the mean of its divisors is an integer number (2648565).

Almost surely, 2^21034158 is an apocalyptic number.

21034158 is an abundant number, since it is smaller than the sum of its proper divisors (21342882).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21034158 is a wasteful number, since it uses less digits than its factorization.

21034158 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25731.

The product of its (nonzero) digits is 960, while the sum is 24.

The square root of 21034158 is about 4586.3011239996. The cubic root of 21034158 is about 276.0419228484.

The spelling of 21034158 in words is "twenty-one million, thirty-four thousand, one hundred fifty-eight".