20454537951 has 48 divisors (see below), whose sum is σ = 32499667200. Its totient is φ = 12339081216.

The previous prime is 20454537931. The next prime is 20454537959. The reversal of 20454537951 is 15973545402.

20454537951 is a `hidden beast` number, since 20 + 4 + 5 + 4 + 537 + 95 + 1 = 666.

It is not a de Polignac number, because 20454537951 - 2⁵ = 20454537919 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 20454537897 and 20454537906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20454537959) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3021096 + ... + 3027858.

It is an arithmetic number, because the mean of its divisors is an integer number (677076400).

Almost surely, 2^20454537951 is an apocalyptic number.

20454537951 is a deficient number, since it is larger than the sum of its proper divisors (12045129249).

20454537951 is a wasteful number, since it uses less digits than its factorization.

20454537951 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7580 (or 7577 counting only the distinct ones).

The product of its (nonzero) digits is 756000, while the sum is 45.

The spelling of 20454537951 in words is "twenty billion, four hundred fifty-four million, five hundred thirty-seven thousand, nine hundred fifty-one".