21036308337 has 32 divisors (see below), whose sum is σ = 35787456000. Its totient is φ = 12078259920.

The previous prime is 21036308333. The next prime is 21036308353. The reversal of 21036308337 is 73380363012.

It is a happy number.

21036308337 is a `hidden beast` number, since 2 + 10 + 3 + 6 + 308 + 337 = 666.

It is not a de Polignac number, because 21036308337 - 2² = 21036308333 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21036308333) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1858287 + ... + 1869572.

It is an arithmetic number, because the mean of its divisors is an integer number (1118358000).

Almost surely, 2^21036308337 is an apocalyptic number.

21036308337 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21036308337 is a deficient number, since it is larger than the sum of its proper divisors (14751147663).

21036308337 is a wasteful number, since it uses less digits than its factorization.

21036308337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3727898 (or 3727892 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 36.

The spelling of 21036308337 in words is "twenty-one billion, thirty-six million, three hundred eight thousand, three hundred thirty-seven".