20786218502 has 16 divisors (see below), whose sum is σ = 35818151712. Its totient is φ = 8862220800.

The previous prime is 20786218457. The next prime is 20786218517. The reversal of 20786218502 is 20581268702.

It is a super-2 number, since 2×20786218502² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20786218502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3843749 + ... + 3849152.

It is an arithmetic number, because the mean of its divisors is an integer number (2238634482).

Almost surely, 2^20786218502 is an apocalyptic number.

20786218502 is a deficient number, since it is larger than the sum of its proper divisors (15031933210).

20786218502 is a wasteful number, since it uses less digits than its factorization.

20786218502 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7693103.

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 20786218502 in words is "twenty billion, seven hundred eighty-six million, two hundred eighteen thousand, five hundred two".