20147437153666 has 8 divisors (see below), whose sum is σ = 30221185904460. Its totient is φ = 10073708518848.

The previous prime is 20147437153661. The next prime is 20147437153687. The reversal of 20147437153666 is 66635173474102.

It can be written as a sum of positive squares in 2 ways, for example, as 18857783928025 + 1289653225641 = 4342555^2 + 1135629^2 .

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

It is a super-2 number, since 2×20147437153666² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20147437153661) 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, 2208771 + ... + 6721126.

Almost surely, 2^{20147437153666} is an apocalyptic number.

20147437153666 is a deficient number, since it is larger than the sum of its proper divisors (10073748750794).

20147437153666 is a wasteful number, since it uses less digits than its factorization.

20147437153666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10057988.

The product of its (nonzero) digits is 15240960, while the sum is 55.

The spelling of 20147437153666 in words is "twenty trillion, one hundred forty-seven billion, four hundred thirty-seven million, one hundred fifty-three thousand, six hundred sixty-six".