20945534570 has 8 divisors (see below), whose sum is σ = 37701962244. Its totient is φ = 8378213824.

The previous prime is 20945534557. The next prime is 20945534593. The reversal of 20945534570 is 7543554902.

It can be written as a sum of positive squares in 2 ways, for example, as 19725359809 + 1220174761 = 140447^2 + 34931^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1047276719 + ... + 1047276738.

Almost surely, 2^20945534570 is an apocalyptic number.

20945534570 is a deficient number, since it is larger than the sum of its proper divisors (16756427674).

20945534570 is a wasteful number, since it uses less digits than its factorization.

20945534570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2094553464.

The product of its (nonzero) digits is 756000, while the sum is 44.

The spelling of 20945534570 in words is "twenty billion, nine hundred forty-five million, five hundred thirty-four thousand, five hundred seventy".