20531313054 has 32 divisors (see below), whose sum is σ = 52143018240. Its totient is φ = 5866089336.

The previous prime is 20531313017. The next prime is 20531313091. The reversal of 20531313054 is 45031313502.

20531313054 is a `hidden beast` number, since 20 + 531 + 31 + 30 + 54 = 666.

It is an interprime number because it is at equal distance from previous prime (20531313017) and next prime (20531313091).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27157444 + ... + 27158199.

It is an arithmetic number, because the mean of its divisors is an integer number (1629469320).

Almost surely, 2^20531313054 is an apocalyptic number.

20531313054 is an abundant number, since it is smaller than the sum of its proper divisors (31611705186).

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

20531313054 is a wasteful number, since it uses less digits than its factorization.

20531313054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54315661 (or 54315655 counting only the distinct ones).

The product of its (nonzero) digits is 5400, while the sum is 27.

Adding to 20531313054 its reverse (45031313502), we get a palindrome (65562626556).

The spelling of 20531313054 in words is "twenty billion, five hundred thirty-one million, three hundred thirteen thousand, fifty-four".