20004356661530 has 16 divisors (see below), whose sum is σ = 36123622838784. Its totient is φ = 7976013587280.

The previous prime is 20004356661517. The next prime is 20004356661551. The reversal of 20004356661530 is 3516665340002.

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, 3216131402 + ... + 3216137621.

It is an arithmetic number, because the mean of its divisors is an integer number (2257726427424).

Almost surely, 2^{20004356661530} is an apocalyptic number.

20004356661530 is a deficient number, since it is larger than the sum of its proper divisors (16119266177254).

20004356661530 is a wasteful number, since it uses less digits than its factorization.

20004356661530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6432269341.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 20004356661530 in words is "twenty trillion, four billion, three hundred fifty-six million, six hundred sixty-one thousand, five hundred thirty".