21436720362 has 16 divisors (see below), whose sum is σ = 47637156480. Its totient is φ = 7145573436.

The previous prime is 21436720321. The next prime is 21436720363. The reversal of 21436720362 is 26302763412.

21436720362 is a `hidden beast` number, since 214 + 3 + 67 + 20 + 362 = 666.

It is a super-2 number, since 2×21436720362² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21436720363) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198488098 + ... + 198488205.

It is an arithmetic number, because the mean of its divisors is an integer number (2977322280).

Almost surely, 2^21436720362 is an apocalyptic number.

21436720362 is an abundant number, since it is smaller than the sum of its proper divisors (26200436118).

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

21436720362 is a wasteful number, since it uses less digits than its factorization.

21436720362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396976314 (or 396976308 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 36.

The spelling of 21436720362 in words is "twenty-one billion, four hundred thirty-six million, seven hundred twenty thousand, three hundred sixty-two".