20793877954 has 8 divisors (see below), whose sum is σ = 31250685708. Its totient is φ = 10376982720.

The previous prime is 20793877933. The next prime is 20793877957. The reversal of 20793877954 is 45977839702.

It can be written as a sum of positive squares in 2 ways, for example, as 16940324025 + 3853553929 = 130155^2 + 62077^2 .

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

It is a super-2 number, since 2×20793877954² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 20793877892 and 20793877901.

It is not an unprimeable number, because it can be changed into a prime (20793877957) 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, 9976827 + ... + 9978910.

Almost surely, 2^20793877954 is an apocalyptic number.

20793877954 is a deficient number, since it is larger than the sum of its proper divisors (10456807754).

20793877954 is a wasteful number, since it uses less digits than its factorization.

20793877954 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19956260.

The product of its (nonzero) digits is 26671680, while the sum is 61.

The spelling of 20793877954 in words is "twenty billion, seven hundred ninety-three million, eight hundred seventy-seven thousand, nine hundred fifty-four".