20545002 has 40 divisors (see below), whose sum is σ = 47532672. Its totient is φ = 6625800.

The previous prime is 20545001. The next prime is 20545037. The reversal of 20545002 is 20054502.

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 (20545001) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2977 + ... + 7067.

Almost surely, 2^20545002 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 20545002, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (23766336).

20545002 is an abundant number, since it is smaller than the sum of its proper divisors (26987670).

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

20545002 is a wasteful number, since it uses less digits than its factorization.

20545002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4136 (or 4127 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 18.

The square root of 20545002 is about 4532.6594842322. The cubic root of 20545002 is about 273.8853037274.

Adding to 20545002 its reverse (20054502), we get a palindrome (40599504).

It can be divided in two parts, 2054500 and 2, that added together give a palindrome (2054502).

The spelling of 20545002 in words is "twenty million, five hundred forty-five thousand, two".