21472194 has 16 divisors (see below), whose sum is σ = 43087968. Its totient is φ = 7133472.

The previous prime is 21472189. The next prime is 21472219. The reversal of 21472194 is 49127412.

It is a super-2 number, since 2×21472194² = 922110230347272, which contains 22 as substring.

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, 3987 + ... + 7670.

It is an arithmetic number, because the mean of its divisors is an integer number (2692998).

Almost surely, 2^21472194 is an apocalyptic number.

21472194 is an abundant number, since it is smaller than the sum of its proper divisors (21615774).

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

21472194 is a wasteful number, since it uses less digits than its factorization.

21472194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11969.

The product of its digits is 4032, while the sum is 30.

The square root of 21472194 is about 4633.8098795699. The cubic root of 21472194 is about 277.9449626222.

The spelling of 21472194 in words is "twenty-one million, four hundred seventy-two thousand, one hundred ninety-four".