20725145202 has 16 divisors (see below), whose sum is σ = 41456540160. Its totient is φ = 6907340112.

The previous prime is 20725145197. The next prime is 20725145209. The reversal of 20725145202 is 20254152702.

It is a self number, because there is not a number n which added to its sum of digits gives 20725145202.

It is not an unprimeable number, because it can be changed into a prime (20725145209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 216733 + ... + 297360.

It is an arithmetic number, because the mean of its divisors is an integer number (2591033760).

Almost surely, 2^20725145202 is an apocalyptic number.

20725145202 is an abundant number, since it is smaller than the sum of its proper divisors (20731394958).

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

20725145202 is a wasteful number, since it uses less digits than its factorization.

20725145202 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520817.

The product of its (nonzero) digits is 11200, while the sum is 30.

Adding to 20725145202 its reverse (20254152702), we get a palindrome (40979297904).

The spelling of 20725145202 in words is "twenty billion, seven hundred twenty-five million, one hundred forty-five thousand, two hundred two".