20520101204242 has 16 divisors (see below), whose sum is σ = 31856822922240. Its totient is φ = 9901499931792.

The previous prime is 20520101204233. The next prime is 20520101204243. The reversal of 20520101204242 is 24240210102502.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (20520101204243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 84803538 + ... + 85045165.

It is an arithmetic number, because the mean of its divisors is an integer number (1991051432640).

Almost surely, 2^{20520101204242} is an apocalyptic number.

20520101204242 is a deficient number, since it is larger than the sum of its proper divisors (11336721717998).

20520101204242 is a wasteful number, since it uses less digits than its factorization.

20520101204242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169850817.

The product of its (nonzero) digits is 2560, while the sum is 25.

Adding to 20520101204242 its reverse (24240210102502), we get a palindrome (44760311306744).

The spelling of 20520101204242 in words is "twenty trillion, five hundred twenty billion, one hundred one million, two hundred four thousand, two hundred forty-two".