21419770 has 8 divisors (see below), whose sum is σ = 38555604. Its totient is φ = 8567904.

The previous prime is 21419767. The next prime is 21419771. The reversal of 21419770 is 7791412.

It can be written as a sum of positive squares in 2 ways, for example, as 20277009 + 1142761 = 4503^2 + 1069^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21419771) 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, 1070979 + ... + 1070998.

Almost surely, 2^21419770 is an apocalyptic number.

21419770 is a deficient number, since it is larger than the sum of its proper divisors (17135834).

21419770 is a wasteful number, since it uses less digits than its factorization.

21419770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2141984.

The product of its (nonzero) digits is 3528, while the sum is 31.

The square root of 21419770 is about 4628.1497382863. The cubic root of 21419770 is about 277.7185789699.

It can be divided in two parts, 2141 and 9770, that added together give a palindrome (11911).

The spelling of 21419770 in words is "twenty-one million, four hundred nineteen thousand, seven hundred seventy".