20545131154 has 8 divisors (see below), whose sum is σ = 30819356928. Its totient is φ = 10272012180.

The previous prime is 20545131143. The next prime is 20545131203. The reversal of 20545131154 is 45113154502.

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

It is a super-2 number, since 2×20545131154² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 228622 + ... + 305545.

It is an arithmetic number, because the mean of its divisors is an integer number (3852419616).

Almost surely, 2^20545131154 is an apocalyptic number.

20545131154 is a deficient number, since it is larger than the sum of its proper divisors (10274225774).

20545131154 is a wasteful number, since it uses less digits than its factorization.

20545131154 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553400.

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 20545131154 its reverse (45113154502), we get a palindrome (65658285656).

The spelling of 20545131154 in words is "twenty billion, five hundred forty-five million, one hundred thirty-one thousand, one hundred fifty-four".