20951039198 has 8 divisors (see below), whose sum is σ = 31546052208. Its totient is φ = 10435688464.

The previous prime is 20951039171. The next prime is 20951039209. The reversal of 20951039198 is 89193015902.

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

It is a super-2 number, since 2×20951039198² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19914911 + ... + 19915962.

It is an arithmetic number, because the mean of its divisors is an integer number (3943256526).

Almost surely, 2^20951039198 is an apocalyptic number.

20951039198 is a deficient number, since it is larger than the sum of its proper divisors (10595013010).

20951039198 is a wasteful number, since it uses less digits than its factorization.

20951039198 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39831138.

The product of its (nonzero) digits is 174960, while the sum is 47.

The spelling of 20951039198 in words is "twenty billion, nine hundred fifty-one million, thirty-nine thousand, one hundred ninety-eight".