21470141 has 16 divisors (see below), whose sum is σ = 27278208. Its totient is φ = 16411200.

The previous prime is 21470123. The next prime is 21470149. The reversal of 21470141 is 14107412.

It is a cyclic number.

It is not a de Polignac number, because 21470141 - 2¹⁸ = 21207997 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1451 + ... + 6711.

It is an arithmetic number, because the mean of its divisors is an integer number (1704888).

Almost surely, 2^21470141 is an apocalyptic number.

It is an amenable number.

21470141 is a deficient number, since it is larger than the sum of its proper divisors (5808067).

21470141 is a wasteful number, since it uses less digits than its factorization.

21470141 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5332.

The product of its (nonzero) digits is 224, while the sum is 20.

The square root of 21470141 is about 4633.5883502961. The cubic root of 21470141 is about 277.9361040461.

Adding to 21470141 its reverse (14107412), we get a palindrome (35577553).

The spelling of 21470141 in words is "twenty-one million, four hundred seventy thousand, one hundred forty-one".