20012542045000 has 40 divisors (see below), whose sum is σ = 46889386023150. Its totient is φ = 8005016816000.

The previous prime is 20012542044991. The next prime is 20012542045009. The reversal of 20012542045000 is 54024521002.

It is an interprime number because it is at equal distance from previous prime (20012542044991) and next prime (20012542045009).

It can be written as a sum of positive squares in 5 ways, for example, as 283860921796 + 19728681123204 = 532786^2 + 4441698^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (20012542045009) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 2001249205 + ... + 2001259204.

Almost surely, 2^{20012542045000} is an apocalyptic number.

20012542045000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20012542045000 is an abundant number, since it is smaller than the sum of its proper divisors (26876843978150).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20012542045000 is an equidigital number, since it uses as much as digits as its factorization.

20012542045000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4002508435 (or 4002508416 counting only the distinct ones).

The product of its (nonzero) digits is 3200, while the sum is 25.

Adding to 20012542045000 its reverse (54024521002), we get a palindrome (20066566566002).

The spelling of 20012542045000 in words is "twenty trillion, twelve billion, five hundred forty-two million, forty-five thousand".