21061419 has 16 divisors (see below), whose sum is σ = 29957760. Its totient is φ = 13115520.

The previous prime is 21061363. The next prime is 21061427. The reversal of 21061419 is 91416012.

It is not a de Polignac number, because 21061419 - 2¹¹ = 21059371 is a prime.

It is a super-2 number, since 2×21061419² = 887166740587122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21061459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5604 + ... + 8574.

It is an arithmetic number, because the mean of its divisors is an integer number (1872360).

Almost surely, 2^21061419 is an apocalyptic number.

21061419 is a deficient number, since it is larger than the sum of its proper divisors (8896341).

21061419 is a wasteful number, since it uses less digits than its factorization.

21061419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3130.

The product of its (nonzero) digits is 432, while the sum is 24.

The square root of 21061419 is about 4589.2721645159. The cubic root of 21061419 is about 276.1611246761.

The spelling of 21061419 in words is "twenty-one million, sixty-one thousand, four hundred nineteen".