11363640421 has 16 divisors (see below), whose sum is σ = 13256870400. Its totient is φ = 9736727280.

The previous prime is 11363640419. The next prime is 11363640427. The reversal of 11363640421 is 12404636311.

It is a happy number.

It is not a de Polignac number, because 11363640421 - 2¹ = 11363640419 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11363640427) 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, 1461075 + ... + 1468831.

It is an arithmetic number, because the mean of its divisors is an integer number (828554400).

Almost surely, 2^11363640421 is an apocalyptic number.

It is an amenable number.

11363640421 is a deficient number, since it is larger than the sum of its proper divisors (1893229979).

11363640421 is an frugal number, since it uses more digits than its factorization.

11363640421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12049 (or 12035 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The spelling of 11363640421 in words is "eleven billion, three hundred sixty-three million, six hundred forty thousand, four hundred twenty-one".