36286721820 has 60 divisors (see below), whose sum is σ = 113832795384. Its totient is φ = 9676458720.

The previous prime is 36286721789. The next prime is 36286721851. The reversal of 36286721820 is 2812768263.

36286721820 is a `hidden beast` number, since 3 + 628 + 6 + 7 + 2 + 18 + 2 + 0 = 666.

It is an interprime number because it is at equal distance from previous prime (36286721789) and next prime (36286721851).

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-3 number, since 3×36286721820³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11197986 + ... + 11201225.

Almost surely, 2^36286721820 is an apocalyptic number.

36286721820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

36286721820 is an abundant number, since it is smaller than the sum of its proper divisors (77546073564).

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

36286721820 is a wasteful number, since it uses less digits than its factorization.

36286721820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22399232 (or 22399221 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 45.

The spelling of 36286721820 in words is "thirty-six billion, two hundred eighty-six million, seven hundred twenty-one thousand, eight hundred twenty".