20211002402 has 4 divisors (see below), whose sum is σ = 30316503606. Its totient is φ = 10105501200.

The previous prime is 20211002401. The next prime is 20211002407. The reversal of 20211002402 is 20420011202.

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., 14896446601 + 5314555801 = 122051^2 + 72901^2 .

It is not an unprimeable number, because it can be changed into a prime (20211002401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5052750599 + ... + 5052750602.

Almost surely, 2^20211002402 is an apocalyptic number.

20211002402 is a deficient number, since it is larger than the sum of its proper divisors (10105501204).

20211002402 is a wasteful number, since it uses less digits than its factorization.

20211002402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105501203.

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 20211002402 its reverse (20420011202), we get a palindrome (40631013604).

The spelling of 20211002402 in words is "twenty billion, two hundred eleven million, two thousand, four hundred two".