21447702 has 12 divisors (see below), whose sum is σ = 46470060. Its totient is φ = 7149228.

The previous prime is 21447697. The next prime is 21447709. The reversal of 21447702 is 20774412.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21447709) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 595752 + ... + 595787.

It is an arithmetic number, because the mean of its divisors is an integer number (3872505).

Almost surely, 2^21447702 is an apocalyptic number.

21447702 is an abundant number, since it is smaller than the sum of its proper divisors (25022358).

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

21447702 is a wasteful number, since it uses less digits than its factorization.

21447702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1191547 (or 1191544 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 21447702 is about 4631.1663757632. The cubic root of 21447702 is about 277.8392442229.

The spelling of 21447702 in words is "twenty-one million, four hundred forty-seven thousand, seven hundred two".