21471074 has 8 divisors (see below), whose sum is σ = 32375808. Its totient is φ = 10679140.

The previous prime is 21471067. The next prime is 21471077. The reversal of 21471074 is 47017412.

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

It is a super-2 number, since 2×21471074² = 922014037426952, which contains 22 as substring.

It is a plaindrome in base 11.

It is not an unprimeable number, because it can be changed into a prime (21471077) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 27722 + ... + 28485.

It is an arithmetic number, because the mean of its divisors is an integer number (4046976).

Almost surely, 2^21471074 is an apocalyptic number.

21471074 is a deficient number, since it is larger than the sum of its proper divisors (10904734).

21471074 is a wasteful number, since it uses less digits than its factorization.

21471074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56400.

The product of its (nonzero) digits is 1568, while the sum is 26.

The square root of 21471074 is about 4633.6890271144. The cubic root of 21471074 is about 277.9401299571.

Adding to 21471074 its reverse (47017412), we get a palindrome (68488486).

It can be divided in two parts, 2147 and 1074, that multiplied together give a triangular number (2305878 = T₂₁₄₇).

The spelling of 21471074 in words is "twenty-one million, four hundred seventy-one thousand, seventy-four".