20941661354436 has 81 divisors (see below), whose sum is σ = 53299308727119. Its totient is φ = 6932952090000.

The previous prime is 20941661354417. The next prime is 20941661354459. The reversal of 20941661354436 is 63445316614902.

The square root of 20941661354436 is 4576206.

It is a perfect power (a square), and thus also a powerful number.

20941661354436 is a `hidden beast` number, since 2 + 0 + 9 + 4 + 1 + 6 + 61 + 3 + 544 + 36 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 4146040111 + ... + 4146045161.

Almost surely, 2^{20941661354436} is an apocalyptic number.

20941661354436 is the 4576206-th square number.

It is an amenable number.

20941661354436 is an abundant number, since it is smaller than the sum of its proper divisors (32357647372683).

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

20941661354436 is an frugal number, since it uses more digits than its factorization.

20941661354436 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10414 (or 5207 counting only the distinct ones).

The product of its (nonzero) digits is 11197440, while the sum is 54.

The spelling of 20941661354436 in words is "twenty trillion, nine hundred forty-one billion, six hundred sixty-one million, three hundred fifty-four thousand, four hundred thirty-six".