21004151430 has 64 divisors (see below), whose sum is σ = 50665430016. Its totient is φ = 5572800000.

The previous prime is 21004151393. The next prime is 21004151431. The reversal of 21004151430 is 3415140012.

It is a junction number, because it is equal to n+sod(n) for n = 21004151397 and 21004151406.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21004151431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5182905 + ... + 5186955.

It is an arithmetic number, because the mean of its divisors is an integer number (791647344).

Almost surely, 2^21004151430 is an apocalyptic number.

21004151430 is an abundant number, since it is smaller than the sum of its proper divisors (29661278586).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21004151430 is a wasteful number, since it uses less digits than its factorization.

21004151430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4893.

The product of its (nonzero) digits is 480, while the sum is 21.

Adding to 21004151430 its reverse (3415140012), we get a palindrome (24419291442).

The spelling of 21004151430 in words is "twenty-one billion, four million, one hundred fifty-one thousand, four hundred thirty".