20531617354 has 8 divisors (see below), whose sum is σ = 30800740608. Its totient is φ = 10264703820.

The previous prime is 20531617333. The next prime is 20531617357. The reversal of 20531617354 is 45371613502.

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

It is a super-2 number, since 2×20531617354² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20531617357) by changing a digit.

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, 529002 + ... + 566485.

It is an arithmetic number, because the mean of its divisors is an integer number (3850092576).

Almost surely, 2^20531617354 is an apocalyptic number.

20531617354 is a deficient number, since it is larger than the sum of its proper divisors (10269123254).

20531617354 is a wasteful number, since it uses less digits than its factorization.

20531617354 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1104860.

The product of its (nonzero) digits is 75600, while the sum is 37.

It can be divided in two parts, 20531 and 617354, that added together give a triangular number (637885 = T₁₁₂₉).

The spelling of 20531617354 in words is "twenty billion, five hundred thirty-one million, six hundred seventeen thousand, three hundred fifty-four".