21264380037 has 16 divisors (see below), whose sum is σ = 31619042560. Its totient is φ = 14123937600.

The previous prime is 21264380023. The next prime is 21264380057. The reversal of 21264380037 is 73008346212.

It is a happy number.

21264380037 is a `hidden beast` number, since 2 + 1 + 2 + 643 + 8 + 0 + 0 + 3 + 7 = 666.

It is not a de Polignac number, because 21264380037 - 2¹⁰ = 21264379013 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21264379983 and 21264380010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21264380057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1445764 + ... + 1460397.

It is an arithmetic number, because the mean of its divisors is an integer number (1976190160).

Almost surely, 2^21264380037 is an apocalyptic number.

21264380037 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

21264380037 is a deficient number, since it is larger than the sum of its proper divisors (10354662523).

21264380037 is a wasteful number, since it uses less digits than its factorization.

21264380037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906441 (or 2906435 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The spelling of 21264380037 in words is "twenty-one billion, two hundred sixty-four million, three hundred eighty thousand, thirty-seven".