20101023002 has 4 divisors (see below), whose sum is σ = 30151534506. Its totient is φ = 10050511500.

The previous prime is 20101022959. The next prime is 20101023011. The reversal of 20101023002 is 20032010102.

It is a happy number.

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., 12488286001 + 7612737001 = 111751^2 + 87251^2 .

It is a super-2 number, since 2×20101023002² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5025255749 + ... + 5025255752.

Almost surely, 2^20101023002 is an apocalyptic number.

20101023002 is a deficient number, since it is larger than the sum of its proper divisors (10050511504).

20101023002 is a wasteful number, since it uses less digits than its factorization.

20101023002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10050511503.

The product of its (nonzero) digits is 24, while the sum is 11.

Adding to 20101023002 its reverse (20032010102), we get a palindrome (40133033104).

The spelling of 20101023002 in words is "twenty billion, one hundred one million, twenty-three thousand, two".