21477314547254 has 4 divisors (see below), whose sum is σ = 32215971820884. Its totient is φ = 10738657273626.

The previous prime is 21477314547253. The next prime is 21477314547263. The reversal of 21477314547254 is 45274541377412.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×21477314547254² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21477314547254.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21477314547253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5369328636812 + ... + 5369328636815.

It is an arithmetic number, because the mean of its divisors is an integer number (8053992955221).

Almost surely, 2^{21477314547254} is an apocalyptic number.

21477314547254 is a deficient number, since it is larger than the sum of its proper divisors (10738657273630).

21477314547254 is a wasteful number, since it uses less digits than its factorization.

21477314547254 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10738657273629.

The product of its digits is 26342400, while the sum is 56.

The spelling of 21477314547254 in words is "twenty-one trillion, four hundred seventy-seven billion, three hundred fourteen million, five hundred forty-seven thousand, two hundred fifty-four".