21004151422 has 8 divisors (see below), whose sum is σ = 31512709872. Its totient is φ = 10499914800.

The previous prime is 21004151393. The next prime is 21004151431. The reversal of 21004151422 is 22415140012.

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

It is a junction number, because it is equal to n+sod(n) for n = 21004151393 and 21004151402.

It is a congruent number.

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, 1068279 + ... + 1087762.

It is an arithmetic number, because the mean of its divisors is an integer number (3939088734).

Almost surely, 2^21004151422 is an apocalyptic number.

21004151422 is a deficient number, since it is larger than the sum of its proper divisors (10508558450).

21004151422 is a wasteful number, since it uses less digits than its factorization.

21004151422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2160914.

The product of its (nonzero) digits is 640, while the sum is 22.

Adding to 21004151422 its reverse (22415140012), we get a palindrome (43419291434).

The spelling of 21004151422 in words is "twenty-one billion, four million, one hundred fifty-one thousand, four hundred twenty-two".