20261100502 has 8 divisors (see below), whose sum is σ = 31439638800. Its totient is φ = 9781220904.

The previous prime is 20261100493. The next prime is 20261100569. The reversal of 20261100502 is 20500116202.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 20261100502.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 174664602 + ... + 174664717.

It is an arithmetic number, because the mean of its divisors is an integer number (3929954850).

Almost surely, 2^20261100502 is an apocalyptic number.

20261100502 is a deficient number, since it is larger than the sum of its proper divisors (11178538298).

20261100502 is a wasteful number, since it uses less digits than its factorization.

20261100502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349329350.

The product of its (nonzero) digits is 240, while the sum is 19.

Adding to 20261100502 its reverse (20500116202), we get a palindrome (40761216704).

The spelling of 20261100502 in words is "twenty billion, two hundred sixty-one million, one hundred thousand, five hundred two".