20535081278 has 8 divisors (see below), whose sum is σ = 30805377672. Its totient is φ = 10266622056.

The previous prime is 20535081277. The next prime is 20535081311. The reversal of 20535081278 is 87218053502.

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

It is a super-2 number, since 2×20535081278² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20535081271) 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, 431000 + ... + 476267.

It is an arithmetic number, because the mean of its divisors is an integer number (3850672209).

Almost surely, 2^20535081278 is an apocalyptic number.

20535081278 is a deficient number, since it is larger than the sum of its proper divisors (10270296394).

20535081278 is a wasteful number, since it uses less digits than its factorization.

20535081278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 918586.

The product of its (nonzero) digits is 134400, while the sum is 41.

The spelling of 20535081278 in words is "twenty billion, five hundred thirty-five million, eighty-one thousand, two hundred seventy-eight".