20515054000 has 80 divisors (see below), whose sum is σ = 56691925056. Its totient is φ = 7033728000.

The previous prime is 20515053991. The next prime is 20515054009. The reversal of 20515054000 is 45051502.

It is an interprime number because it is at equal distance from previous prime (20515053991) and next prime (20515054009).

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (20515054009) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 718681 + ... + 746680.

Almost surely, 2^20515054000 is an apocalyptic number.

20515054000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20515054000 is an abundant number, since it is smaller than the sum of its proper divisors (36176871056).

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

20515054000 is a wasteful number, since it uses less digits than its factorization.

20515054000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1465391 (or 1465375 counting only the distinct ones).

The product of its (nonzero) digits is 1000, while the sum is 22.

The spelling of 20515054000 in words is "twenty billion, five hundred fifteen million, fifty-four thousand".