21069270 has 24 divisors (see below), whose sum is σ = 54780336. Its totient is φ = 5618448.

The previous prime is 21069253. The next prime is 21069287. The reversal of 21069270 is 7296012.

It is an interprime number because it is at equal distance from previous prime (21069253) and next prime (21069287).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 116962 + ... + 117141.

It is an arithmetic number, because the mean of its divisors is an integer number (2282514).

Almost surely, 2^21069270 is an apocalyptic number.

21069270 is an abundant number, since it is smaller than the sum of its proper divisors (33711066).

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

21069270 is a wasteful number, since it uses less digits than its factorization.

21069270 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234116 (or 234113 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 21069270 is about 4590.1274492110. The cubic root of 21069270 is about 276.1954349892.

The spelling of 21069270 in words is "twenty-one million, sixty-nine thousand, two hundred seventy".