20531333402 has 8 divisors (see below), whose sum is σ = 31096000416. Its totient is φ = 10165999932.

The previous prime is 20531333399. The next prime is 20531333437. The reversal of 20531333402 is 20433313502.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49833128 + ... + 49833539.

It is an arithmetic number, because the mean of its divisors is an integer number (3887000052).

Almost surely, 2^20531333402 is an apocalyptic number.

20531333402 is a deficient number, since it is larger than the sum of its proper divisors (10564667014).

20531333402 is a wasteful number, since it uses less digits than its factorization.

20531333402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99666772.

The product of its (nonzero) digits is 6480, while the sum is 26.

Adding to 20531333402 its reverse (20433313502), we get a palindrome (40964646904).

The spelling of 20531333402 in words is "twenty billion, five hundred thirty-one million, three hundred thirty-three thousand, four hundred two".