20523522400 has 36 divisors (see below), whose sum is σ = 50103051012. Its totient is φ = 8209408640.

The previous prime is 20523522373. The next prime is 20523522413. The reversal of 20523522400 is 422532502.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12826402 + ... + 12828001.

It is an arithmetic number, because the mean of its divisors is an integer number (1391751417).

Almost surely, 2^20523522400 is an apocalyptic number.

20523522400 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20523522400 is an abundant number, since it is smaller than the sum of its proper divisors (29579528612).

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

20523522400 is a wasteful number, since it uses less digits than its factorization.

20523522400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25654423 (or 25654410 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 25.

The spelling of 20523522400 in words is "twenty billion, five hundred twenty-three million, five hundred twenty-two thousand, four hundred".