21369070 has 32 divisors (see below), whose sum is σ = 40917312. Its totient is φ = 8017152.

The previous prime is 21369059. The next prime is 21369109. The reversal of 21369070 is 7096312.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11314 + ... + 13066.

It is an arithmetic number, because the mean of its divisors is an integer number (1278666).

Almost surely, 2^21369070 is an apocalyptic number.

21369070 is a deficient number, since it is larger than the sum of its proper divisors (19548242).

21369070 is a wasteful number, since it uses less digits than its factorization.

21369070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1836.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 21369070 is about 4622.6691423895. The cubic root of 21369070 is about 277.4992884758.

The spelling of 21369070 in words is "twenty-one million, three hundred sixty-nine thousand, seventy".