20961383479474 has 32 divisors (see below), whose sum is σ = 34117009643520. Its totient is φ = 9626998610448.

The previous prime is 20961383479471. The next prime is 20961383479529. The reversal of 20961383479474 is 47497438316902.

It is not an unprimeable number, because it can be changed into a prime (20961383479471) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54652342 + ... + 55034545.

It is an arithmetic number, because the mean of its divisors is an integer number (1066156551360).

Almost surely, 2^{20961383479474} is an apocalyptic number.

20961383479474 is a deficient number, since it is larger than the sum of its proper divisors (13155626164046).

20961383479474 is a wasteful number, since it uses less digits than its factorization.

20961383479474 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109687062.

The product of its (nonzero) digits is 219469824, while the sum is 67.

The spelling of 20961383479474 in words is "twenty trillion, nine hundred sixty-one billion, three hundred eighty-three million, four hundred seventy-nine thousand, four hundred seventy-four".