20810690234 has 8 divisors (see below), whose sum is σ = 32858984640. Its totient is φ = 9857695356.

The previous prime is 20810690231. The next prime is 20810690269. The reversal of 20810690234 is 43209601802.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 20810690194 and 20810690203.

It is not an unprimeable number, because it can be changed into a prime (20810690231) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 273824834 + ... + 273824909.

It is an arithmetic number, because the mean of its divisors is an integer number (4107373080).

Almost surely, 2^20810690234 is an apocalyptic number.

20810690234 is a deficient number, since it is larger than the sum of its proper divisors (12048294406).

20810690234 is a wasteful number, since it uses less digits than its factorization.

20810690234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 547649764.

The product of its (nonzero) digits is 20736, while the sum is 35.

The spelling of 20810690234 in words is "twenty billion, eight hundred ten million, six hundred ninety thousand, two hundred thirty-four".