20951463280 has 40 divisors (see below), whose sum is σ = 53140531824. Its totient is φ = 7618713600.

The previous prime is 20951463277. The next prime is 20951463287. The reversal of 20951463280 is 8236415902.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20951463287) 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, 11903361 + ... + 11905120.

Almost surely, 2^20951463280 is an apocalyptic number.

20951463280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

20951463280 is an abundant number, since it is smaller than the sum of its proper divisors (32189068544).

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

20951463280 is a wasteful number, since it uses less digits than its factorization.

20951463280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23808505 (or 23808499 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The spelling of 20951463280 in words is "twenty billion, nine hundred fifty-one million, four hundred sixty-three thousand, two hundred eighty".