20401010002 has 4 divisors (see below), whose sum is σ = 30601515006. Its totient is φ = 10200505000.

The previous prime is 20401009991. The next prime is 20401010009. The reversal of 20401010002 is 20001010402.

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., 20397838041 + 3171961 = 142821^2 + 1781^2 .

It is not an unprimeable number, because it can be changed into a prime (20401010009) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5100252499 + ... + 5100252502.

Almost surely, 2^20401010002 is an apocalyptic number.

20401010002 is a deficient number, since it is larger than the sum of its proper divisors (10200505004).

20401010002 is a wasteful number, since it uses less digits than its factorization.

20401010002 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10200505003.

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 20401010002 its reverse (20001010402), we get a palindrome (40402020404).

The spelling of 20401010002 in words is "twenty billion, four hundred one million, ten thousand, two".