20842812502 has 4 divisors (see below), whose sum is σ = 31264218756. Its totient is φ = 10421406250.

The previous prime is 20842812499. The next prime is 20842812539. The reversal of 20842812502 is 20521824802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 20521824802 = 2 ⋅10260912401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5210703124 + ... + 5210703127.

It is an arithmetic number, because the mean of its divisors is an integer number (7816054689).

Almost surely, 2^20842812502 is an apocalyptic number.

20842812502 is a deficient number, since it is larger than the sum of its proper divisors (10421406254).

20842812502 is a wasteful number, since it uses less digits than its factorization.

20842812502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10421406253.

The product of its (nonzero) digits is 20480, while the sum is 34.

The spelling of 20842812502 in words is "twenty billion, eight hundred forty-two million, eight hundred twelve thousand, five hundred two".