20213002 has 4 divisors (see below), whose sum is σ = 30319506. Its totient is φ = 10106500.

The previous prime is 20212991. The next prime is 20213047. The reversal of 20213002 is 20031202.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 19900521 + 312481 = 4461^2 + 559^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20213002.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5053249 + ... + 5053252.

Almost surely, 2^20213002 is an apocalyptic number.

20213002 is a deficient number, since it is larger than the sum of its proper divisors (10106504).

20213002 is a wasteful number, since it uses less digits than its factorization.

20213002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10106503.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 20213002 is about 4495.8872316819. The cubic root of 20213002 is about 272.4019881504.

Adding to 20213002 its reverse (20031202), we get a palindrome (40244204).

The spelling of 20213002 in words is "twenty million, two hundred thirteen thousand, two".