21151301305434 has 32 divisors (see below), whose sum is σ = 42311350774464. Its totient is φ = 7048975933440.

The previous prime is 21151301305423. The next prime is 21151301305457. The reversal of 21151301305434 is 43450310315112.

It is a junction number, because it is equal to n+sod(n) for n = 21151301305395 and 21151301305404.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 914402049 + ... + 914425179.

It is an arithmetic number, because the mean of its divisors is an integer number (1322229711702).

Almost surely, 2^{21151301305434} is an apocalyptic number.

21151301305434 is an abundant number, since it is smaller than the sum of its proper divisors (21160049469030).

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

21151301305434 is a wasteful number, since it uses less digits than its factorization.

21151301305434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48062.

The product of its (nonzero) digits is 21600, while the sum is 33.

The spelling of 21151301305434 in words is "twenty-one trillion, one hundred fifty-one billion, three hundred one million, three hundred five thousand, four hundred thirty-four".