21470061 has 8 divisors (see below), whose sum is σ = 28670944. Its totient is φ = 14291280.

The previous prime is 21470047. The next prime is 21470069. The reversal of 21470061 is 16007412.

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

It is not a de Polignac number, because 21470061 - 2²¹ = 19372909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21470069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3106 + ... + 7251.

It is an arithmetic number, because the mean of its divisors is an integer number (3583868).

Almost surely, 2^21470061 is an apocalyptic number.

It is an amenable number.

21470061 is a deficient number, since it is larger than the sum of its proper divisors (7200883).

21470061 is a wasteful number, since it uses less digits than its factorization.

21470061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11051.

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 21470061 is about 4633.5797176697. The cubic root of 21470061 is about 277.9357588393.

Adding to 21470061 its reverse (16007412), we get a palindrome (37477473).

The spelling of 21470061 in words is "twenty-one million, four hundred seventy thousand, sixty-one".