21177156714 has 16 divisors (see below), whose sum is σ = 48404929728. Its totient is φ = 6050616192.

The previous prime is 21177156713. The next prime is 21177156733. The reversal of 21177156714 is 41765177112.

It is a super-3 number, since 3×21177156714³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 504218017 = 21177156714 / (2 + 1 + 1 + 7 + 7 + 1 + 5 + 6 + 7 + 1 + 4).

It is not an unprimeable number, because it can be changed into a prime (21177156713) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 252108967 + ... + 252109050.

It is an arithmetic number, because the mean of its divisors is an integer number (3025308108).

Almost surely, 2^21177156714 is an apocalyptic number.

21177156714 is an abundant number, since it is smaller than the sum of its proper divisors (27227773014).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21177156714 is a wasteful number, since it uses less digits than its factorization.

21177156714 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504218029.

The product of its digits is 82320, while the sum is 42.

The spelling of 21177156714 in words is "twenty-one billion, one hundred seventy-seven million, one hundred fifty-six thousand, seven hundred fourteen".