21322070 has 32 divisors (see below), whose sum is σ = 47851776. Its totient is φ = 6645600.

The previous prime is 21322057. The next prime is 21322073. The reversal of 21322070 is 7022312.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21322073) 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, 13076 + ... + 14615.

It is an arithmetic number, because the mean of its divisors is an integer number (1495368).

Almost surely, 2^21322070 is an apocalyptic number.

21322070 is an abundant number, since it is smaller than the sum of its proper divisors (26529706).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21322070 is a wasteful number, since it uses less digits than its factorization.

21322070 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27716.

The product of its (nonzero) digits is 168, while the sum is 17.

The square root of 21322070 is about 4617.5827009378. The cubic root of 21322070 is about 277.2956914030.

Adding to 21322070 its reverse (7022312), we get a palindrome (28344382).

The spelling of 21322070 in words is "twenty-one million, three hundred twenty-two thousand, seventy".