20274655450 has 48 divisors (see below), whose sum is σ = 44584289280. Its totient is φ = 6711606720.

The previous prime is 20274655439. The next prime is 20274655459. The reversal of 20274655450 is 5455647202.

It is a super-2 number, since 2×20274655450² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (20274655459) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 988602 + ... + 1008901.

It is an arithmetic number, because the mean of its divisors is an integer number (928839360).

Almost surely, 2^20274655450 is an apocalyptic number.

20274655450 is an abundant number, since it is smaller than the sum of its proper divisors (24309633830).

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

20274655450 is a wasteful number, since it uses less digits than its factorization.

20274655450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1997551 (or 1997546 counting only the distinct ones).

The product of its (nonzero) digits is 336000, while the sum is 40.

The spelling of 20274655450 in words is "twenty billion, two hundred seventy-four million, six hundred fifty-five thousand, four hundred fifty".