21097354 has 8 divisors (see below), whose sum is σ = 31687488. Its totient is φ = 10534860.

The previous prime is 21097337. The next prime is 21097369. The reversal of 21097354 is 45379012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4882 + ... + 8125.

It is an arithmetic number, because the mean of its divisors is an integer number (3960936).

Almost surely, 2^21097354 is an apocalyptic number.

21097354 is a deficient number, since it is larger than the sum of its proper divisors (10590134).

21097354 is a wasteful number, since it uses less digits than its factorization.

21097354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13820.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 21097354 is about 4593.1856047845. The cubic root of 21097354 is about 276.3180975013.

The spelling of 21097354 in words is "twenty-one million, ninety-seven thousand, three hundred fifty-four".