20453620431 has 32 divisors (see below), whose sum is σ = 29996822016. Its totient is φ = 12344192000.

The previous prime is 20453620427. The next prime is 20453620457. The reversal of 20453620431 is 13402635402.

It is a cyclic number.

It is not a de Polignac number, because 20453620431 - 2² = 20453620427 is a prime.

It is a super-3 number, since 3×20453620431³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20453620331) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 79576 + ... + 217346.

It is an arithmetic number, because the mean of its divisors is an integer number (937400688).

Almost surely, 2^20453620431 is an apocalyptic number.

20453620431 is a deficient number, since it is larger than the sum of its proper divisors (9543201585).

20453620431 is a wasteful number, since it uses less digits than its factorization.

20453620431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137903.

The product of its (nonzero) digits is 17280, while the sum is 30.

The spelling of 20453620431 in words is "twenty billion, four hundred fifty-three million, six hundred twenty thousand, four hundred thirty-one".