21770702 has 4 divisors (see below), whose sum is σ = 32656056. Its totient is φ = 10885350.

The previous prime is 21770701. The next prime is 21770731. The reversal of 21770702 is 20707712.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21770701) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5442674 + ... + 5442677.

It is an arithmetic number, because the mean of its divisors is an integer number (8164014).

Almost surely, 2^21770702 is an apocalyptic number.

21770702 is a deficient number, since it is larger than the sum of its proper divisors (10885354).

21770702 is a wasteful number, since it uses less digits than its factorization.

21770702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10885353.

The product of its (nonzero) digits is 1372, while the sum is 26.

The square root of 21770702 is about 4665.9084860293. The cubic root of 21770702 is about 279.2270433407.

The spelling of 21770702 in words is "twenty-one million, seven hundred seventy thousand, seven hundred two".