13463237721 has 16 divisors (see below), whose sum is σ = 19505315840. Its totient is φ = 8228802960.

The previous prime is 13463237719. The next prime is 13463237729. The reversal of 13463237721 is 12773236431.

It is not a de Polignac number, because 13463237721 - 2¹ = 13463237719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13463237721.

It is not an unprimeable number, because it can be changed into a prime (13463237729) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3807865 + ... + 3811398.

It is an arithmetic number, because the mean of its divisors is an integer number (1219082240).

Almost surely, 2^13463237721 is an apocalyptic number.

It is an amenable number.

13463237721 is a deficient number, since it is larger than the sum of its proper divisors (6042078119).

13463237721 is a wasteful number, since it uses less digits than its factorization.

13463237721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7619316.

The product of its digits is 127008, while the sum is 39.

The spelling of 13463237721 in words is "thirteen billion, four hundred sixty-three million, two hundred thirty-seven thousand, seven hundred twenty-one".