21530162667470 has 128 divisors (see below), whose sum is σ = 43546460544000. Its totient is φ = 7624282152960.

The previous prime is 21530162667457. The next prime is 21530162667511. The reversal of 21530162667470 is 7476626103512.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 194349656 + ... + 194460404.

It is an arithmetic number, because the mean of its divisors is an integer number (340206723000).

Almost surely, 2^{21530162667470} is an apocalyptic number.

21530162667470 is an abundant number, since it is smaller than the sum of its proper divisors (22016297876530).

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

21530162667470 is a wasteful number, since it uses less digits than its factorization.

21530162667470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 111838.

The product of its (nonzero) digits is 2540160, while the sum is 50.

The spelling of 21530162667470 in words is "twenty-one trillion, five hundred thirty billion, one hundred sixty-two million, six hundred sixty-seven thousand, four hundred seventy".