20720023835 has 16 divisors (see below), whose sum is σ = 29109108672. Its totient is φ = 13861478400.

The previous prime is 20720023801. The next prime is 20720023843. The reversal of 20720023835 is 53832002702.

It is not a de Polignac number, because 20720023835 - 2⁶ = 20720023771 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7218086 + ... + 7220955.

It is an arithmetic number, because the mean of its divisors is an integer number (1819319292).

Almost surely, 2^20720023835 is an apocalyptic number.

20720023835 is a deficient number, since it is larger than the sum of its proper divisors (8389084837).

20720023835 is a wasteful number, since it uses less digits than its factorization.

20720023835 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14439094.

The product of its (nonzero) digits is 20160, while the sum is 32.

The spelling of 20720023835 in words is "twenty billion, seven hundred twenty million, twenty-three thousand, eight hundred thirty-five".