20347002 has 48 divisors (see below), whose sum is σ = 48058920. Its totient is φ = 6183936.

The previous prime is 20346983. The next prime is 20347007. The reversal of 20347002 is 20074302.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 15848361 + 4498641 = 3981^2 + 2121^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (20347007) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20338 + ... + 21314.

Almost surely, 2^20347002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20347002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24029460).

20347002 is an abundant number, since it is smaller than the sum of its proper divisors (27711918).

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

20347002 is a wasteful number, since it uses less digits than its factorization.

20347002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087 (or 1084 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 18.

The square root of 20347002 is about 4510.7651235683. The cubic root of 20347002 is about 273.0026164061.

The spelling of 20347002 in words is "twenty million, three hundred forty-seven thousand, two".