20783720102 has 8 divisors (see below), whose sum is σ = 31275824112. Its totient is φ = 10358445400.

The previous prime is 20783720101. The next prime is 20783720119. The reversal of 20783720102 is 20102738702.

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

It is a super-3 number, since 3×20783720102³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20783720101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16706549 + ... + 16707792.

It is an arithmetic number, because the mean of its divisors is an integer number (3909478014).

Almost surely, 2^20783720102 is an apocalyptic number.

20783720102 is a deficient number, since it is larger than the sum of its proper divisors (10492104010).

20783720102 is a wasteful number, since it uses less digits than its factorization.

20783720102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33414654.

The product of its (nonzero) digits is 9408, while the sum is 32.

The spelling of 20783720102 in words is "twenty billion, seven hundred eighty-three million, seven hundred twenty thousand, one hundred two".