21011403152 has 20 divisors (see below), whose sum is σ = 41376965916. Its totient is φ = 10333476480.

The previous prime is 21011403151. The next prime is 21011403199. The reversal of 21011403152 is 25130411012.

It can be written as a sum of positive squares in 2 ways, for example, as 3013570816 + 17997832336 = 54896^2 + 134156^2 .

It is not an unprimeable number, because it can be changed into a prime (21011403151) 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, 10763063 + ... + 10765014.

Almost surely, 2^21011403152 is an apocalyptic number.

It is an amenable number.

21011403152 is a deficient number, since it is larger than the sum of its proper divisors (20365562764).

21011403152 is a wasteful number, since it uses less digits than its factorization.

21011403152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21528146 (or 21528140 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 20.

Adding to 21011403152 its reverse (25130411012), we get a palindrome (46141814164).

The spelling of 21011403152 in words is "twenty-one billion, eleven million, four hundred three thousand, one hundred fifty-two".