20453357274 has 32 divisors (see below), whose sum is σ = 46875903360. Its totient is φ = 5828144832.

The previous prime is 20453357219. The next prime is 20453357297. The reversal of 20453357274 is 47275335402.

It is a super-2 number, since 2×20453357274² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 637129 + ... + 668460.

It is an arithmetic number, because the mean of its divisors is an integer number (1464871980).

Almost surely, 2^20453357274 is an apocalyptic number.

20453357274 is an abundant number, since it is smaller than the sum of its proper divisors (26422546086).

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

20453357274 is a wasteful number, since it uses less digits than its factorization.

20453357274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1305974.

The product of its (nonzero) digits is 705600, while the sum is 42.

The spelling of 20453357274 in words is "twenty billion, four hundred fifty-three million, three hundred fifty-seven thousand, two hundred seventy-four".