21433123402 has 16 divisors (see below), whose sum is σ = 32830300800. Its totient is φ = 10491197760.

The previous prime is 21433123381. The next prime is 21433123421. The reversal of 21433123402 is 20432133412.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 348402 + ... + 405277.

It is an arithmetic number, because the mean of its divisors is an integer number (2051893800).

Almost surely, 2^21433123402 is an apocalyptic number.

21433123402 is a deficient number, since it is larger than the sum of its proper divisors (11397177398).

21433123402 is a wasteful number, since it uses less digits than its factorization.

21433123402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 753981.

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 21433123402 its reverse (20432133412), we get a palindrome (41865256814).

The spelling of 21433123402 in words is "twenty-one billion, four hundred thirty-three million, one hundred twenty-three thousand, four hundred two".