21012540014 has 32 divisors (see below), whose sum is σ = 32280439680. Its totient is φ = 10255212000.

The previous prime is 21012540011. The next prime is 21012540047. The reversal of 21012540014 is 41004521012.

It is a happy number.

It is a super-2 number, since 2×21012540014² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21012540011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11052464 + ... + 11054364.

It is an arithmetic number, because the mean of its divisors is an integer number (1008763740).

Almost surely, 2^21012540014 is an apocalyptic number.

21012540014 is a deficient number, since it is larger than the sum of its proper divisors (11267899666).

21012540014 is a wasteful number, since it uses less digits than its factorization.

21012540014 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2576.

The product of its (nonzero) digits is 320, while the sum is 20.

The spelling of 21012540014 in words is "twenty-one billion, twelve million, five hundred forty thousand, fourteen".