10387021356 has 18 divisors (see below), whose sum is σ = 26256081852. Its totient is φ = 3462340440.

The previous prime is 10387021343. The next prime is 10387021361. The reversal of 10387021356 is 65312078301.

10387021356 is a `hidden beast` number, since 10 + 387 + 0 + 213 + 56 = 666.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 288528371 = 10387021356 / (1 + 0 + 3 + 8 + 7 + 0 + 2 + 1 + 3 + 5 + 6).

It is a self number, because there is not a number n which added to its sum of digits gives 10387021356.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 144264150 + ... + 144264221.

It is an arithmetic number, because the mean of its divisors is an integer number (1458671214).

Almost surely, 2^10387021356 is an apocalyptic number.

It is an amenable number.

10387021356 is an abundant number, since it is smaller than the sum of its proper divisors (15869060496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

10387021356 is a wasteful number, since it uses less digits than its factorization.

10387021356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288528381 (or 288528376 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

Adding to 10387021356 its reverse (65312078301), we get a palindrome (75699099657).

The spelling of 10387021356 in words is "ten billion, three hundred eighty-seven million, twenty-one thousand, three hundred fifty-six".