21403213002 has 12 divisors (see below), whose sum is σ = 46373628210. Its totient is φ = 7134404328.

The previous prime is 21403213001. The next prime is 21403213003. The reversal of 21403213002 is 20031230412.

21403213002 is a `hidden beast` number, since 2 + 1 + 40 + 321 + 300 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (21403213001) and next prime (21403213003).

It can be written as a sum of positive squares in only one way, i.e., 18384919281 + 3018293721 = 135591^2 + 54939^2 .

It is a Harshad number since it is a multiple of its sum of digits (18), and also a Moran number because the ratio is a prime number: 1189067389 = 21403213002 / (2 + 1 + 4 + 0 + 3 + 2 + 1 + 3 + 0 + 0 + 2).

It is not an unprimeable number, because it can be changed into a prime (21403213001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 594533677 + ... + 594533712.

Almost surely, 2^21403213002 is an apocalyptic number.

21403213002 is an abundant number, since it is smaller than the sum of its proper divisors (24970415208).

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

21403213002 is a wasteful number, since it uses less digits than its factorization.

21403213002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189067397 (or 1189067394 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 21403213002 its reverse (20031230412), we get a palindrome (41434443414).

The spelling of 21403213002 in words is "twenty-one billion, four hundred three million, two hundred thirteen thousand, two".