20520737350004 has 24 divisors (see below), whose sum is σ = 36000551375880. Its totient is φ = 10234867562496.

The previous prime is 20520737349989. The next prime is 20520737350019. The reversal of 20520737350004 is 40005373702502.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20520737349989) and next prime (20520737350019).

It can be written as a sum of positive squares in 4 ways, for example, as 15275043388900 + 5245693961104 = 3908330^2 + 2290348^2 .

It is a super-2 number, since 2×20520737350004² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20520737350004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42322754 + ... + 42804870.

It is an arithmetic number, because the mean of its divisors is an integer number (1500022973995).

Almost surely, 2^{20520737350004} is an apocalyptic number.

It is an amenable number.

20520737350004 is a deficient number, since it is larger than the sum of its proper divisors (15479814025876).

20520737350004 is a wasteful number, since it uses less digits than its factorization.

20520737350004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508547 (or 508545 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 38.

The spelling of 20520737350004 in words is "twenty trillion, five hundred twenty billion, seven hundred thirty-seven million, three hundred fifty thousand, four".