21150012154364 has 12 divisors (see below), whose sum is σ = 37013206925688. Its totient is φ = 10574810175600.

The previous prime is 21150012154361. The next prime is 21150012154393. The reversal of 21150012154364 is 46345121005112.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21150012154361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48732347 + ... + 49164434.

It is an arithmetic number, because the mean of its divisors is an integer number (3084433910474).

Almost surely, 2^{21150012154364} is an apocalyptic number.

It is an amenable number.

21150012154364 is a deficient number, since it is larger than the sum of its proper divisors (15863194771324).

21150012154364 is a wasteful number, since it uses less digits than its factorization.

21150012154364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97950796 (or 97950794 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 35.

Adding to 21150012154364 its reverse (46345121005112), we get a palindrome (67495133159476).

The spelling of 21150012154364 in words is "twenty-one trillion, one hundred fifty billion, twelve million, one hundred fifty-four thousand, three hundred sixty-four".