20451633234 has 16 divisors (see below), whose sum is σ = 40983632640. Its totient is φ = 6803816720.

The previous prime is 20451633229. The next prime is 20451633239. The reversal of 20451633234 is 43233615402.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (20451633229) and next prime (20451633239).

It is a junction number, because it is equal to n+sod(n) for n = 20451633195 and 20451633204.

It is not an unprimeable number, because it can be changed into a prime (20451633239) 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, 3345282 + ... + 3351389.

It is an arithmetic number, because the mean of its divisors is an integer number (2561477040).

Almost surely, 2^20451633234 is an apocalyptic number.

20451633234 is an abundant number, since it is smaller than the sum of its proper divisors (20531999406).

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

20451633234 is a wasteful number, since it uses less digits than its factorization.

20451633234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6697185.

The product of its (nonzero) digits is 51840, while the sum is 33.

The spelling of 20451633234 in words is "twenty billion, four hundred fifty-one million, six hundred thirty-three thousand, two hundred thirty-four".