20211430402 has 4 divisors (see below), whose sum is σ = 30317145606. Its totient is φ = 10105715200.

The previous prime is 20211430399. The next prime is 20211430451. The reversal of 20211430402 is 20403411202.

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., 14495919201 + 5715511201 = 120399^2 + 75601^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 20211430402.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5052857599 + ... + 5052857602.

Almost surely, 2^20211430402 is an apocalyptic number.

20211430402 is a deficient number, since it is larger than the sum of its proper divisors (10105715204).

20211430402 is a wasteful number, since it uses less digits than its factorization.

20211430402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10105715203.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 20211430402 its reverse (20403411202), we get a palindrome (40614841604).

The spelling of 20211430402 in words is "twenty billion, two hundred eleven million, four hundred thirty thousand, four hundred two".