21434958 has 12 divisors (see below), whose sum is σ = 46442448. Its totient is φ = 7144980.

The previous prime is 21434957. The next prime is 21435017. The reversal of 21434958 is 85943412.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21434953) by changing a digit.

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 in 5 ways as a sum of consecutive naturals, for example, 595398 + ... + 595433.

It is an arithmetic number, because the mean of its divisors is an integer number (3870204).

Almost surely, 2^21434958 is an apocalyptic number.

21434958 is an abundant number, since it is smaller than the sum of its proper divisors (25007490).

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

21434958 is a wasteful number, since it uses less digits than its factorization.

21434958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1190839 (or 1190836 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 21434958 is about 4629.7902760276. The cubic root of 21434958 is about 277.7842035965.

The spelling of 21434958 in words is "twenty-one million, four hundred thirty-four thousand, nine hundred fifty-eight".