20145754546 has 4 divisors (see below), whose sum is σ = 30218631822. Its totient is φ = 10072877272.

The previous prime is 20145754471. The next prime is 20145754567. The reversal of 20145754546 is 64545754102.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64545754102 = 2 ⋅32272877051.

It can be written as a sum of positive squares in only one way, i.e., 20033288521 + 112466025 = 141539^2 + 10605^2 .

It is a super-2 number, since 2×20145754546² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5036438635 + ... + 5036438638.

Almost surely, 2^20145754546 is an apocalyptic number.

20145754546 is a deficient number, since it is larger than the sum of its proper divisors (10072877276).

20145754546 is a wasteful number, since it uses less digits than its factorization.

20145754546 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10072877275.

The product of its (nonzero) digits is 672000, while the sum is 43.

The spelling of 20145754546 in words is "twenty billion, one hundred forty-five million, seven hundred fifty-four thousand, five hundred forty-six".